Entry 1 sense Webster, 1913 Crustaceology /(-j?)/ · Crus·ta·ce·ol·o·gy · IPA /kɹʌsˌteɪʃiˈɒləd͡ʒi/ 01 n. That branch of Zoology which treats of the Crustacea; malacostracology; carcinology. 1. That branch of Zoology which treats of the Crustacea; malacostracology; carcinology.