The Collaborative International Dictionary
Leucosoid
Leucosoid \Leu"co*soid\ (-soid), a. [NL. Leucosia, the typical genus (fr. Gr. leyko`s white) + -oid.] (Zo["o]l.) Like or pertaining to the Leucosoidea, a tribe of marine crabs including the box crab or Calappa.
Wiktionary
leucosoid
a. (context zoology English) Resembling or pertaining to the ''Leucosidea'', a tribe of marine crabs.