The Collaborative International Dictionary
Perigynium
Perigynium \Per`i*gyn"i*um\, n.; pl. Perigynia. [NL. See Perigynous.] (Bot.) 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 Cyperace[ae].
Wiktionary
perigynium
n. (context botany English) Any unusual appendage around the pistil, such as the bottle-shaped body in the sedges, or the bristles and scales in some other genus of the sedge family.