• Webster's Revised Unabridged Dictionary
    • n Macacus (Zoöl) A genus of monkeys, found in Asia and the East Indies, now usually called Macaca. They have short tails and prominent eyebrows. See also Macaca.
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Century Dictionary and Cyclopedia
    • n macacus A genus of Old World catarrhine monkeys of the family Cercopithecidæ or Cynopithecidæ; the macaques. The genus formerly included monkeys between the doacs (Semnopithecinæ) and the baboons or drills (Cynocephalinæ). It was next restricted to species inhabiting the East Indies, having cheek-pouches, ischial callosities, and a fifth tubercle on the back molar, such as the wanderoo (M. silenus), the bonnet-macaque (M. sinicus), the rhesus monkey (M. rhesus), the common toque (M. cynomolgus), etc. It is now restricted to species resembling the last-named. The leading genera which have been dissociated from Macacus are Cercocebus, Inuus, Theropithecus, Cynopithecus, and Cercopithecus.
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Webster's Revised Unabridged Dictionary
NL., a word of African origin. Cf. Macaco Macaque


In literature:

I myself regard it as that of a Macacus-embryo.
"Darwin and Modern Science" by A.C. Seward and Others
Macacus silenus L., an Indian ape.
"More Letters of Charles Darwin Volume II" by Charles Darwin
Some naturalists of the day, however, place all under the generic name Macacus.
"Natural History of the Mammalia of India and Ceylon" by Robert A. Sterndale
I myself regard it as that of a Macacus-embryo.
"Evolution in Modern Thought" by Ernst Haeckel
It belongs to the genus Macacus, is an extinct species, and was found in Suffolk, in lat.
"Principles of Geology" by Charles Lyell
Mental Life of two Macacus rhesus Monkeys in Captivity.
"Clever Hans" by Oskar Pfungst
Macacus, in Eocene formation, 203.
"A Manual of Elementary Geology" by Charles Lyell
The bonnet monkey is of the genus macacus, and is to be found in many parts of India.
"Natural History in Anecdote" by Various