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Definition of Pneumatic bone
1. Noun. (anatomy) Any bone, such as the mastoid process or those of the birds, that contains many hollow cells full of air ¹
¹ Source: wiktionary.com
Medical Definition of Pneumatic bone
1. A bone that is hollow or contains many air cells, such as the mastoid process of the temporal bone. Synonym: os pneumaticum, hollow bone. (05 Mar 2000)