From The Collaborative International Dictionary of English v.0.48 [gcide]:
Stamen \Sta"men\ (st[=a]"m[e^]n), n.; pl. E. Stamens
(-m[e^]nz) (used only in the second sense); L. Stamina
(st[a^]m"[i^]*n[.a]) (in the first sense). [L. stamen the
warp, a thread, fiber, akin to Gr. sth`mwn the warp, fr.
'ista`nai to stand, akin to E. stand. See Stand, and cf.
Stamin, Stamina.]
1. A thread; especially, a warp thread.
[1913 Webster]
2. (pl. Stamens, rarely Stamina.) (Bot.) The male organ
of flowers for secreting and furnishing the pollen or
fecundating dust. It consists of the anther and filament.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
stamen
n 1: the male reproductive organ of a flower