A kind of baboon (Cynocephalus porcarius) found in S. Africa.
1835. Penny Cycl., III. 229/2. The Chacma, so called from the Hottentot word T’Chackamma, the aboriginal name of this baboon in South Africa … when full grown, is equal in size, and much superior in strength, to a common English mastiff. Ibid., 230/1. A full-grown chacma is more than a match for two good dogs.
1855. Mayne Reid, Bush Boys, 447. Totty dispersing the Chacmas.
