racemosePronunciation: /ˈrasɪməʊs, -z/Definition of racemose adjective Botany (of a flower cluster) taking the form of a raceme. Anatomy (especially of compound glands) having the form of a cluster. Origin: late 17th century: from Latin racemosus, from racemus (see raceme)racemose in other Oxford dictionaries Definition of racemose in the US English dictionary