Pycnogonida
Pronunciation : Pyc`no*gon"i*da
Part of Speech : n.
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : 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.
pl.
Source : Webster's Unabridged Dictionary, 1913