(physics) subatomic particles with a spin (quantum angular momentum) of 0, predicted by supersymmetry; the bosonic equivalent of known fermions

(usually clothing) Initialism of small (of the manufactured size).

The nineteenth letter of the English alphabet, called ess and written in the Latin script.

The ordinal number nineteenth, derived from this letter of the English alphabet, called ess and written in the Latin script.

(set theory) An axiomatic set theory, developed by logician George Boolos, in which several of the axioms of ZF are derivable as theorems.

Initialism of south. / Initialism of season (group of episodes of a series). / (usually clothing, singular only) Initialism of small (the manufactured size or an item of that size).

(business, often attributive) Initialism of sales and administration.

(Internet slang, tone indicator) Denotes that the preceding statement is sarcastic.

Alternative form of SA / Alternative form of S.A.

Genitival interfix used to link elements in some compounds, equivalent to the possessive clitic -'s.