Source : Webster's Revised Unabridged Dictionary (1913)

Carcinology \Car`ci*nol"o*gy\, n. [Gr. ? a crab + -logy.]
   (Zo["o]l.)
   The department of zo["o]logy which treats of the Crustacea
   (lobsters, crabs, etc.); -- called also {malacostracology}
   and {crustaceology}.