2. (Bot.)
(a) The minute breathing pores of leaves or other organs
opening into the intercellular spaces, and usually
bordered by two contractile cells.
(b) The line of dehiscence of the sporangium of a fern. It
is usually marked by two transversely elongated cells.
See Illust. of {Sporangium}.
3. (Zo["o]l.) A stigma. See {Stigma}, n., 6
(a) &
(b) .