1. (a.) Of or pertaining to vesicles; esp., Of or pertaining to the air vesicles, or air cells, Of the lungs; as, vesicular breathing, or normal breathing, in which the air enters freely the air vesicles Of the lungs.

2. (a.) Containing, or composed of, vesicles or vesicle like structures; covered with vesicles or bladders; vesiculate; as, vesicular coral; vesicular lava; a vesicular leaf.

3. (a.) Having the form or structure of a vesicle; as, a vesicular body.

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