Mam-ma´li-a [Vid. mammal.]
Man´tis [Gr. mantis, prophet.] The mantises are insects noted for the manner in which they carry the large spinous fore legs when waiting for prey. They have the attitude, then, as if praying.
Mar´mo-set. A small South-American monkey.
Mar-si-po-bran´chi-i [Gr. marsipos, bag; branchia, gills.]
Mar-su´pi-al [Lat. marsupium, pouch.] Animals having a marsupium or pouch for retaining the young.
Mas´to-don [Gr. mastos, breast; odous, tooth.] An extinct elephant.
Me-dul´la [Lat. medius, middle.] A subdivision of the brain—that portion especially that is continuous with the spinal chord.
Men-o-bran´chus [Gr. meno, remain; branchia, gills.] A large American aquatic amphibian, of salamander-like form, with persistent gills, as the mud-puppy.
Mens sana in corpore sano. A Latin phrase meaning a sound mind in a sound body.
Mes-en-ceph´a-lon [Gr. mesos, middle; enkephalos, brain.] A fundamental segment of the brain.