1 definition found From The Collaborative International Dictionary of English v.0.48 [gcide]: Laughing \Laugh"ing\, a. & n. from {Laugh}, v. i. [1913 Webster] {Laughing falcon} (Zool.), a South American hawk ({Herpetotheres cachinnans}); -- so called from its notes, which resemble a shrill laugh. {Laughing gas} (Chem.), nitrous oxide, also called hyponitrous oxide, or protoxide of nitrogen; -- so called from the exhilaration and laughing which it sometimes produces when inhaled. It has been much used as an anaesthetic agent, though now its use is primarily in dentistry {Laughing goose} (Zool.), the European white-fronted goose. {Laughing gull}. (Zool.) (a) A common European gull ({Xema ridibundus}); -- called also {pewit}, {black cap}, {red-legged gull}, and {sea crow}. (b) An American gull ({Larus atricilla}). In summer the head is nearly black, the back slate color, and the five outer primaries black. {Laughing hyena} (Zool.), the spotted hyena. See {Hyena}. {Laughing jackass} (Zool.), the great brown kingfisher ({Dacelo gigas}), of Australia; -- called also {giant kingfisher}, and {gogobera}. {Laughing owl} (Zool.), a peculiar owl ({Sceloglaux albifacies}) of New Zealand, said to be on the verge of extinction. The name alludes to its notes. [1913 Webster]
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