sea spider Meaning, Definition & Usage

  1. noun any of various small spiderlike marine arthropods having small thin bodies and long slender legs
    pycnogonid.

WordNet

Sea" spi"der
Definitions
  1. (Zoöl.) (a) Any maioid crab; a spider crab. See Maioid, and Spider crab, under Spider. (b) Any pycnogonid.

Webster 1913