Found 2 items, similar to antrum.
English → English (WordNet) Definition: antrum antrum n : a natural cavity or hollow in a bone [also: antra (pl)]
English → English (gcide) Definition: Antrum Antrum \An"trum\, n.; pl. Antra. [L., fr. Gr. ?.] A cavern or cavity, esp. an anatomical cavity or sinus. --Huxley. [1913 Webster] ||