| aqualung | (noun) a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus | Synonyms: Aqua-Lung, scuba |
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| lung | (noun) either of two saclike respiratory organs in the chest of vertebrates; serves to remove carbon dioxide and provide oxygen to the blood | - |
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| quellung | (noun) the swelling of the capsule surrounding a microorganism after reaction with an antibody; the basis of certain tests for identifying microorganisms | Synonyms: quellung reaction |
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