mei MOI -mem-mei- cmavo

convert number to cardinality selbri; x1 is the mass formed from set x2 whose n member(s) are x3.

[x1 is a mass with N components x3 composing set x2; x2 is an n-tuple (x2 is completely specified) (= selmei for reordered places); x1 forms an n-some; x3 (not necessarily a complete enumeration) are among the members of x2]; See also cmima, gunma, cmavo list moi.

In notes:

x1 is a member/element of set x2; x1 belongs to group x2; x1 is amid/among/amongst group x2.
x1 is a paragraph about x2 including sentence(s) x3.