PERIGYNIUM

Per`i*gyn"i*um, n.; pl. Perigynia. Etym: [NL. See Perigynous.] (Bot.)

Definition: Some unusual appendage about the pistil, as the bottle-shaped body in the sedges, and the bristles or scales in some other genera of the Sedge family, or Cyperaceæ.

Source: Webster’s Unabridged Dictionary 1913 Edition