PYCNODONT
Pyc"no*dont, n. Etym: [Gr. (Paleon.)
Defn: Any fossil fish belonging to the Pycnodontini. They have numerous round, flat teeth, adapted for crushing.
PYCNODONTINI
Pyc`no*don"ti*ni, n. pl. Etym: [NL.] (Zoöl.)
Defn: An extinct order of ganoid fishes. They had a compressed body, covered with dermal ribs (pleurolepida) and with enameled rhomboidal scales.
PYCNOGONID
Pyc*nog"o*nid, n. (Zoöl.)
Defn: One of the Pycnogonida.
PYCNOGONIDA
Pyc`no*gon"i*da, n. pl. Etym: [NL., fr. Gr. (Zoöl.)
Defn: A class of marine arthropods in which the body is small and thin, and the eight legs usually very long; — called also Pantopoda.
Note: The abdomen is rudimentary, and the triangular mouth is at the end of a tubular proboscis. Many of them live at great depths in the sea, and the largest of them measure two feet across the extended legs.
PYCNOMETER
Pyc*nom"e*ter, n. Etym: [Gr. -meter.] (Physics)