Word Study
    antrum
WORDNET DICTIONARY
Noun antrum has 1 sense
CIDE DICTIONARY
antrum, n. [L., fr. Gr. .]. 
                                            
                                         A cavern or cavity, esp. an anatomical cavity or sinus                                         Huxley.                                         [1913 Webster]                                                                                                                    
                                                                                    OXFORD DICTIONARY
antrum, n.  (pl.  antra) Anat.  a natural chamber or cavity in the body, esp. in a bone.
                    Derivative
                        antral adj.
                                                                Etymology
                        L f. Gk antron cave
                                    
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