On gloss:

ky
letteral for k.

In definition:

dekyki'opitki'otre
d1=k^21=p1=k^11=m1 is d2=k^22=k^12=m2 (default 1) myriads [tens of thousands of square kilometres] (area unit) measured in perpendicular directions (set)/defined by set of points (set) p2=m3 by standard m4.
fa'ai'ai
mekso k-ary operator, for natural k and 1 < k < 5: ordered input (f, g, S, m) where f and g are functions, S is a set of positive integers or "ro" (="all"), and m is 0 or 1 (as a toggle); output is a function equivalent to the function f as applied to an input ordered tuple with g applied to the entries/terms with indices in S (or to all entries/terms if S="ro") if m=0, or g left-composed with the same if m=1.
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.
koi'o
quaternion k
ne'o'o
mekso quaternary operator – Pochhammer symbol: with/for input (X1, X, this word/function outputs \prodk = 0^X2 - 1 (X; by default, X4 = 1 unless explicitly defined otherwise.
pau'au
ternary mekso operator: p-adic valuation; outputs (positive) infinity if x1 = 0 and, else, outputs sup(Set(k: k is a nonnegative integer, and ((1 - x3)x divides x1)), where pn is the nth prime (such that p1 = 2).
se'i'i
digit/number: Sierpiński constant K = π(2 Loge(2) + 3Log
boltsemaku
x1 is the Boltzmann kB constant linking energy with temperature [approximately equal to: 1.380 6488(13)×10−23 J/K], expressed in units x2 (default: unitless/dimensionless and equal to 1) in paradigm/system/metaphysics/universe x3 (default: this, our actual, physical universe)
sodnrkali
x1 is a quantity of/contains/is made of potassium [K].
stefanboltsemasi
x1 is the black-body Stefan-Boltzmann sigmaSB constant [approximately equal to: 5.670373(21)×10(−8) W/(m2×K4)], expressed in units x2 (default: unitless/dimensionless and equal to pi2 / 480) in paradigm/system/metaphysics/universe x3 (default: this, our actual, physical universe)
tedyxas
Earthsea universe in Ursula K. Le Guin's novels

In notes:

jorny'utka
x1 is joined/connected to/with something which is joined/connected to/with something which ... which is joined/connected to/with something which is joined/connected to/with x2 via intermediate things/steps x3 (ce'o), with respective points/loci of (con)juncture x4 (ce'o).
xunrymutcrai
x1 is infrared (sensu lato) in color; x1's emitted/reflected light has a wavelength which is longer than that which produces the color red.
bi'oi'au
digit/number: interval/range indicator for significant digits (determined by lesser endpoint).
ca'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.
fei'i
mekso variable-arity (at most ternary) operator: number of prime divisors of number X1, counting with or without multiplicity according to the value X2 (1 xor 0 respectively; see note for equality to -1 and for default value), in structure X3.
ga'au
digit/number: Euler–Mascheroni constant, usually denoted by lowercase gamma (γ); approximately 0.5772156649 (in decimal).
gei'au
mekso 7-ary operator: for input (X1 = z, X2 = (ai)= (bj)= p, X5 = q, X6 = h1, X= h2), this word/function outputs/yields \sumn=0^\infty (((\prodi = 1p (ne'o'o(ai,n,1,h= 1q (ne'o'o(bj,n,1,h; by default, X6 = 1 = X7 unless explicitly specified otherwise.
go'ei
repeat (copy-and-paste) the recontextualized content of the most-recent or indicated NOI relative clause.
mi'i'au
digit/number: interval/range indicator for significant digits (determined by midpoint).
te'i'ai
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
aigne
x1 is an eigenvalue (or zero) of linear transformation/square matrix x2, associated with/'owning' all vectors in generalized eigenspace x3 (implies neither nondegeneracy nor degeneracy; default includes the zero vector) with 'eigenspace-generalization' power/exponent x4 (typically and probably by cultural default will be 1), with algebraic multiplicity (of eigenvalue) x5
cmuuugle
x1 (mass/group/set) is the (primary) out-group counterpart to in-group x2 (mass/group/set) with respect to characteristic x3 (ka; truth/proposition), which is possessed/satisfied by x2, where both x1 and x2 are nonempty, strict, mutually disjoint subdivisions of supergroup/superset x4 (mass/group/set), with the othering performed (mentally; not necessarily in a way externally manifested) according to the psyche of x5; x5 others x1 from x2 around focal issue/property x3
daigno
x1 (ordered list) is a sampling of entries of matrix/tensor x2 in which exactly one entry is sampled from each row and/or column (etc.) between entries x3 (list; default: the largest 'square'/'hypercubic' sampling possible in the entire tensor starting with the first entry, see notes) inclusively following selection procedure/rule/function/order x4 (default: diagonally, see notes), where the tensor/matrix is expressed in basis/under conditions x5
grafnseljimcnkipliiu
x1 is a 'quipyew' tree graph with special node x2, on nodes x3 (set of points; includes x2), with edges x4 (set of ordered pairs of nodes), and with other properties x5.
zgirkamnamstaili
x1 reflects/pertains to Gangnam Style music/choreography/phenomenon in aspect x2.
sinsynatis
Cincinnati, Ohio, U.S.A.
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.