hy·me·ni·um (hī-mē'nē-əm) n.
pl.hy·me·ni·a (-nē-ə) or hy·me·ni·ums The spore-bearing layer of the fruiting body of certain fungi, containing asci or basidia.
[New Latin, from Greek humenion, diminutive of humēn, membrane; see hymen.] hy·me'ni·al (-əl) adj.