Aqua-lung
a brand of underwater breathing apparatus for a swimmer or skin-diver, consisting of a cylinder of compressed air that is strapped to the back, a flexible tube connecting the cylinder with the swimmer’s mouth, and an automatic pressure regulator that controls the flow of air into the lungs.
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- Aquamarine
a transparent, light-blue or greenish-blue variety of beryl, used as a gem. light blue-green or greenish blue. Historical Examples aquamarine, which is feebly doubly refracting, separates them but slightly. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade Topaz and aquamarine occur in hollows in the granite of the Mournes. […]
- Aquaphobia
an abnormal fear of water; hydrophobia. noun an abnormal fear of water, esp because of the possibility of drowning Compare hydrophobia (sense 2) aquaphobia aq·ua·pho·bi·a (āk’wə-fō’bē-ə) n. An abnormal fear of water.
- Aquaplane
a board that skims over water when towed at high speed by a motorboat, used to carry a rider in aquatic sports. to ride an aquaplane. (def 7). Historical Examples In a nutshell, what had occurred was this: You know how you aquaplane. Right Ho, Jeeves P. G. Wodehouse noun a single board on which […]
- Aqua pura
pure water. Historical Examples Medical attendance was called, and I passed the night in a bath of attar of roses delicately medicated with aqua pura. Continental Monthly, Vol. III, No IV, April 1863 Various “You see I’m not afraid to risk a dip in the aqua pura,” he said. The Outdoor Girls on Pine Island […]
- Aqua regia
a yellow, fuming liquid composed of one part nitric acid and three to four parts hydrochloric acid: used chiefly to dissolve metals as gold, platinum, or the like. Historical Examples The “platinum chloride” of the laboratory is made by dissolving platinum in aqua regia. An Elementary Study of Chemistry William McPherson If the precipitate fails […]