DIAPSID Antonyms There are 2 antonyms of the word diapsid. (opposite meanings)Did you mean?Definition of DIAPSIDBest Opposite Words For DIAPSIDTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb Expand?WordSave?Synonyms..UsageTypesynapsidnounnnoun • extinct reptile having a single pair of lateral temporal openings in the skullanapsidnoun, adjectiven, adjnoun • primitive reptile having no opening in the temporal region of the skull; all extinct except turtles Alternatives for ANAPSID Words (1)reptilePhrases (1)anapsid reptileOpposite words for anapsid