ste·rig·ma 
(stə-rĭgmə)
(stə-rĭgmə)n. pl. ste·rig·ma·ta (-mə-tə)
A slender projection of the basidium of some fungi that bears a basidiospore.
[New Latin, from Greek stērigma, support, from stērizein, stērig-, to support; see ster-1 in the Appendix of Indo-European roots.]
ster′ig·matic (stĕr′ĭg-mătĭk, stîr′-) adj.