Definition of "macacus" 
- (noun) 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.
Use "macacus" in a sentence
- "In many monkeys, which do not stand high in the order, as baboons and some species of macacus, the upper portion of the ear is slightly pointed, and the margin is not at all folded inwards; but if the margin were to be thus folded, a slight point would necessarily project towards the centre ...."
- "Again, with regard to hair, Darwin notices that occasionally there appears in man a few hairs in the eyebrows much longer than the others; and that they seem to be representative of similarly long and scattered hairs which occur in the chimpanzee, macacus, and baboons."
- "This is likewise the case in anthropoid apes; but in not a few other Quadrumana (e.g. baboons, macacus, magots, &c.) degeneration has not proceeded so far, and the ears are voluntarily moveable."