A case or sheath especially a pollen sac or moss capsule
(Noun)
Synonyms:
thecae
Sacs Sentence Examples
At the end of the airways are clusters of tiny air sacs.
Special sacs developed from the intersegmental septa lodge the developing ova and sperm.
The walls of the renal sacs are deeply plaited and thrown into ridges.
The early symptoms of trachoma include the development of follicles (small sacs) on the conjunctivae of the upper eyelids; pain; swollen eyelids; discharge; tearing; and sensitivity to light.
Spherical sacs, bearing forked spines, described by Williamson under the name of Zygosporites, are frequent, usually in an isolated state.