A manifold which is infinitely differentiable (C ᪲).

(transitive) To make (a rough surface) smooth / (transitive) to pacify (e.g. rumours)

Any of several small North Atlantic coastal sharks of the genus Mustelus.

A kind of flatfish, the megrim.

(idiomatic) Extremely smooth

(orthography) A diacritic mark (᾿/◌̓) in Ancient, Medieval and Modern Greek used to indicate absence of aspiration for an initial vowel, and sometimes for rho, e.g. ἀ, ῤ

plural of smooth sole

plural of smooth manifold

plural of smooth hound

(mathematics) a function that has derivatives of all finite orders everywhere in its domain.