cockscombPronunciation: /ˈkɒkskəʊm/Definition of cockscomb noun 1the crest or comb of a domestic cock. 2 (also coxcomb) a tropical plant with a crest of tiny yellow, orange, or red flowers, grown as a pot plant. Celosia cristata, family Amaranthaceae 3a brightly coloured orchid of southern North America, related to the coralroots. Also called coralroot.Genus Hexalectris, family Orchidaceae cockscomb in other Oxford dictionaries Definition of cockscomb in the US English dictionary