1. (Anat.) One of the spaces in different parts of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell. [ 1913 Webster ]
2. An alveolus. [ PJC ]
Thai-English: NECTEC'sLexitron-2 Dictionary [with local updates]NECTEC Lexitron-2 Dictionary (TH-EN)