sea spider: Meaning and Definition of

sea' spi"der

Pronunciation: [key]
  1. any member of the arthropod class Pycnogonida, marine invertebrates with eight long walking legs attached to a small body consisting of a cephalothorax and vestigial abdomen.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.