On gloss:

by
letteral for b.

In definition:

de'o
binary mathematical operator: logarithm; [log/ln a to base b]; default base 10 or e.
fe'a
binary mathematical operator: nth root of; inverse power [a to the 1/b power].
fe'i
n-ary mathematical operator: divided by; division operator; [(((a / b) / c) / ...)].
fei
digit/number: hex digit B (decimal 11) [eleven].
gei
trinary mathematical operator: order of magnitude/value/base; [b * (c to the a power)].
ju'u
binary mathematical operator: number base; [a interpreted in the base b].
pa'i
binary mathematical operator: ratio; [the ratio of a to b].
pi'i
n-ary mathematical operator: times; multiplication operator; [(((a * b) * c) * ...)].
ri'o
trinary mathematical operator: [integral of a with respect to b over range c].
sa'o
trinary mathematical operator: [derivative of a with respect to b of degree c].
si'i
trinary mathematical operator: [sigma summation of a using variable b over range c].
su'i
n-ary mathematical operator: plus; addition operator; [(((a + b) + c) + ...)].
te'a
binary mathematical operator: to the power; exponential; [a to the b power].
vu'u
n-ary mathematical operator: minus; subtraction operator; [(((a - b) - c) - ...)].
su'ifa'uvu'u (comp!)
mekso operator: plus or minus with order important, (((a±b)±c)±...±z)
su'ijavu'u (comp!)
mekso operator: plus or minus, (((a±b)±c)±...±z)
ca'o'e (exp!)
mekso 4-nary operator: spherical harmonics on colatitudinal/polar angle a and azimuthal/longitudinal angle b of unassociated order c and associated order d.
ci'ai'u (exp!)
Mekso unary or binary operator: n-set or integer interval; in unary form, it maps a nonnegative integer X1 = n to the set \1, \dots , n\ (fully, officially, and precisely: the intersection of (a) the set of exactly all positive integers with (b) the closed ordered interval [1, n] such that n \geq 1; see notes for other n); in binary form, it maps ordered inputs (X1, X= (m, n) to the intersection of (a) the set of exactly all integers with (b) the closed ordered interval [m, n].
cu'ai (exp!)
binary mathematical operator: vector norm/magnitude of vector a in structure (normed vector space) b.
de'au'u (exp!)
mekso ternary operator: positive super-logarithm; the super-logarithm (inverse operator of hyper-operator with respect to "height" of power tower) of a with base b and of order c-2.
dei'au'o (exp!)
mekso binary operator: Lambert product-log W function; W(a, b)
di'ei'o'au (exp!)
mathematical ternary operator: Dirichlet convolution (a×b)(c)
du'ei (exp!)
mekso binary operator: left-handed vectorial cross product (ordered input), -a \times b = b \times a (if using right-hand convention - notice the negative sign/operator or order).
fai'u (exp!)
digit/number: phi, the "golden ratio" (approx. = 1.6180...); the ratio a/b such that it equals (a+b)/a
fe'au'u (exp!)
mekso ternary operator: positive super-root; the bth super-root (inverse operator of hyper-operator with respect to base) of a of order c-2.
fe'ei (exp!)
binary mekso operator: divided by (fraction): a/(b...)
gau'a (exp!)
mekso (no-more-than-4-ary) operator: Gaussian function f(x, a, b, c) = c e-((x-a).
je'e'e (exp!)
mekso operator: associated Legendre polynomial in a with unassociated order b and associated order c
ji'i'u (exp!)
mekso, at-most-5-ary operator: a rounding function; ordered input list is (x,n,t,m,b) and the output is sgn(x) bt roundn (b(-t) abs(x)), with rounding preference n and where the fractional part of b(-t) abs(x) being equal to 1/2 causes the roundn ( ) function to map b(-t) abs(x) to the nearest integer of form 2Z+m, for base b (determined by context if not explicitly input) and some integer Z (determined by context).
kei'au
mekso operator: finite result set derived from/on set A with/due to operator/function B under ordering of application C
ku'au'a (exp!)
mekso (n+1)-ary operator: q-analog converter - the ath analog of b (quoted operator) applied to operands c, d, ...
mu'ai'au (exp!)
mathematical/logical/mekso ternary operator: μ (mu) operator: outputs the most extreme extended-natural number that satisfies relationship/predicate A, where extremeness is bounded by B and of a version determined by C; error output is -1
no'au'au (exp!)
mathematical/mekso binary operator: the zero/identity-element/(primitive (-))constant operator; outputs the identity-element of structure A (contextless default: the additive group of integers) regardless of the input value of B (except blank or ill-defined values)
pi'ei (exp!)
mathematical/mekso binary operator: vector or function inner product over a field; the inner product of A and B over field C
ru'ei (exp!)
n-ary operator: n-ary magma/group/ring operator a*b = ab`
se'au (exp!)
mathematical quinary operator; big operator: left sequence notation/converter - operator a, sequence b defined as a function on index/argument/variable/parameter c, in set d, under ordering e
su'i'o (exp!)
mekso unary or binary operator: ordered inputs (n, b) where n and b are nonnegative integers and b > 1; output is the ultimate digital root of n in base-b.
te'au'u (exp!)
mekso ternary operator: Knuth up-arrow notation: a \uparrow \dots \uparrow b of order/with c-2 arrows ("\uparrow") initially, evaluated from right to left; the cth hyperoperator on a by b.
te'i'ai (exp!)
6-ary mekso/mathematical operator: Heaviside function/step/Theta function of a, of order b, in structure c, using distribution d, within approximated limit e, with value f_b at 0
to'ei'au (exp!)
binary mathematical operator: Jordan totient function Ja(b)
vo'au'u (exp!)
quaternary mathematical operator: (left) convolution (a★b)(c) in structure d
xa'ai (exp!)
mekso operator: the bth branch of the (possibly multivalued) function a
za'ei (exp!)
mekso binary operator: right-handed vectorial cross product (ordered input), a×b
banxulubu
x1 is the language with ISO 639-3 code “xlb” (Loup B).
dansrbreiki
d1 (individual, mass) is breaking/b-boying/b-girling/breakdances to accompaniment/music/rhythm d2.
jicmrboro
x1 is a quantity of/contains/is made of boron [B]
klanrtesla
g1 is g2 tesla(s) of magnetic field B (default is 1) by standard g3.
utkaje
x1 and x2 are path-linked by directed binary predicate x3 (ka) via intermediate steps x4 (ordered list; ce'o) in graph x5, such that (in the graph x5) both (A) no other node exists to which x2 is connected in/by the same way/direction/relation and (B) no other node exists to which x1 is connected in/by the opposite/(anti)symmetric/reversed way/direction/relation.
xumrbura
x1 is an instance of boron (B) with purity x3.
jbobau zei po'o zei pulji
x1 is the "J B O B A U P O h O" police.
cia'o'e
mekso 4-nary operator: spherical harmonics on colatitudinal/polar angle a and azimuthal/longitudinal angle b of unassociated order c and associated order d.
xua'ai
mekso operator: the bth branch of the (possibly multivalued) function a

In notes:

diklo
x1 is local to x2; x1 is confined to locus x2 within range x3; x1 is regional
va'icu'i (comp!)
discursive: in the same words.
ki'irgrafu
x1 is a relation space formed from elements/nodes in set x2 and relationship x3 which connects them.
pavmompazy'utka'au'ypanzi
x1 is any child of the first child of the first child of ... the first child of x2, where the graph geodesic through the ancestorship-directed family tree from x1 to x2 is of length (x3) + 1 (li; x3 must be a nonnegative integer or positive infinity), and where "first" is according to (partial) ordering rule x4 (default: chronological order of birth per successive generation within the given lineage; other restrictions on legitimacy etc. may be specified here as well).
ri'ospa
s1=c1 is a green plant/viridiplantae/viridiphyta/chlorobionta/plantae sensu strictu of species/strain/cultivar s2
rirny'utka'au
x1 is direct ancestor/mentorial-ancestor of x2 of order x3 (li; nonnegative integer) in graph/network of ancestry (family tree) x4 (defaults to maximal option), where x3 is the smallest possible number which is so constrained; x1 is the x3th-great-grandparent of x2.
xilvidru
v1=x1 is a rotavirus of species/breed/defining property v2 capable of infecting [at] v3.
kinfi
x1 is a binary relationship which is symmetric (under exchange of arguments/terms) in space/under conditions/on set x2.
takni
x1 is a binary relationship which is transitive in space/under conditions/on set x2.
bai'i'i (exp!)
mekso operator: in ordered tuple/list/vector/sequence X1, replace the X2th entry with term X3 of appropriate type, and leave all other entries untouched (optional: where the index for the very first/leading/header entry is X4).
bi'ei (exp!)
number/digit: 2(2×5/3) = 8×(2(1/3)).
bi'oi'au (exp!)
digit/number: interval/range indicator for significant digits (determined by lesser endpoint).
ci'o'au (exp!)
mekso operator (binary): projection function; the Bth term/entry ("element") of tuple A
da'a'au (exp!)
mekso operatory: prime mark append
fi'au
mekso operator: continued fraction, Kettenbruch notation; for ordered input (X1, X, where: X1 is an ordered pair of functions and X2 is a free or dummy variable/input/index which ranges through set X3 in order(ing) X4, the result is K(X for Kettenbruch notation K.
gu'ai (exp!)
binary operator: left group action g.x
ku'ai (exp!)
ku'i modal: in contrast to...
mi'i'au (exp!)
digit/number: interval/range indicator for significant digits (determined by midpoint).
moi'u (exp!)
x1 is (n)th member of alphabet/set x2 ordered by rule x3, where the count begins at x4.
pi'ei'au (exp!)
mathematical ternary operator: not-greater-prime-counting function
pi'ei'oi (exp!)
mathematical ternary operator: prime-generating function.
rai'o
Quote conversion: the quotation as presented uses pro-sumti and pro-bridi as if the current utterer (not the original utterer) were saying it, but the meaning conveyed is identical to that of the actual quotation by the original utterer and there is a claim that this meaning was expressed elsewhere
se'u'o (exp!)
selbri conversion question
zi'oi'oi
Delete subsequent sumti slots.
almu
x1 (quoted text) is a fragment/incomplete statement/question/utterance/proposition/text with intended meaning x2 in the context/under conditions x3 (default: the currently relevant context)
cnanxero
x1 s the Heronian mean of the elements of the ordered multiset/list x2.
efklipi
x1 is a binary relation which is right-Euclidean on space/set/under conditions x2.
efklizu
x1 is a binary relation which is left-Euclidean on space/set/under conditions x2.
jarnezi
x1 is a part of Lojban text representing rule 'text' according to the first edition of the book 'The Complete Lojban Language'.
krotene
x1 is a rational number obtained by dividing x2 (integer) by x3 (non-zero integer)
seplrcnite
x1 is a Dedekind cut associated with number/point x2 of totally ordered set x3
utka
x1 and x2 are path-linked by binary predicate x3 (ka) via intermediate steps x4 (ce'o; (ordered) list).
utka'au
x1 and x2 are path-linked by binary predicate x3 (ka; possibly non-symmetric/non-commutative) via a from-x1-to-x2-directed graph geodesic of length x4 (li; nonnegative integer or positive infinity) in graph x5 (default: maximal) which is generated by relation x3.
vendaia
x1 (set) is the unique region/part in the Venn diagram of sets x2 (set of sets; exhaustive) such that each of its (i.e.: x1's) members is a member of exactly each of the explicitly-mentioned elements of x3 (set of sets; subset of x2; exhaustive) and of no other elements of x2.