pneumatic /n(y)o͞oˈmadik/ I. adjective 1. containing or operated by air or gas under pressure. 2. [Zoology] (chiefly of cavities in the bones of birds) containing air. 3. ‹informal› (of a woman) having large breasts • Lee and his pneumatic wife. 4. of or relating to the spirit. II. noun — (usu. pneumatics) 1. an item of pneumatic equipment. III. derivatives 1. pneumatically /n(y)o͞oˈmadək(ə)lē / adverb 2. pneumaticity /ˌn(y)o͞oməˈtisətē / noun – origin mid 17th cent.: from French pneumatique or Latin pneumaticus, from Greek pneumatikos, from pneuma ‘wind,’ from pnein ‘breathe.’
