Ser´rate (serratus, saw-shaped), having marginal teeth shaped like saw teeth.

Ser´rulate (serrulatus, < serrula, dim. of serra, a saw), minutely serrate.

Ses´sile (sessilis, < sessus, pp. sedere, sit), attached by the base; having no stem or support.

Se´ta (pl. Se´tæ) (seta, a bristle), a stiff-bristle-like hair.

Seta´ceous, Setig´erous, Se´tose (seta, bristle), beset with bristles.

Se´tose (setosus, abounding in bristles), bristly.

Set´ulose (setula + ose), finely setose; covered with setules.

Sig´moid (Gr—of the shape of a sigma), said of an elongated spore having the ends bent slightly in opposite directions; S-shaped.

Simple, in botany not formed by a union of similar parts or groups of parts; a simple stem or trunk is one not divided at the base.

Sin´uate, Sin´uose, Sin´uous (sinuatus, pp. sinuare, < sinus, a curve), waved; serpentine; applied to an edge the outline of which is alternately concave and convex; a sinuate lamella has a sudden wave or sinus in its edge near the stem.