n. Same as rhomb.n. [capitalized] An obsolete constellation, near the south pole.n. [NL.] In ichthyology: [capitalized] A genus of Stromateidæ, generally united with Stromateus.n. The Linnean specific name of the turbot (as Pleuronectcs rhombus), and later [capitalized] a generic name of the same (as Rhombus maximus), and of various other flatfishes now assigned to different genera.