Monotremata (mon-ō-trē´ma-ta).—An order of mammals having the intestine and the ducts of the urinary and genital organs open into a common orifice.
Myriapoda (mĭr-ĭ-ŏp´ō-dȧ).—A class of arthropoda. Articulate land animals having many legs, as the centipede.
Natatores (nā´tȧ-tō´rēz).—An order of birds that swim.
Neuroptera (nū-rŏp´tĕ-rȧ).—An order of insects with four membraneous wings, as dragon-flies.
Nocturnal (nŏk-tûr´nal).—Of the night. Nocturnal birds are birds that fly abroad during the night only.
Notochord (nō´tō-kôrd).—A primitive backbone.
Omnivorous (ŏm-nĭv´ō-rŭs).—Living on both vegetables and flesh.
Orthoptera (ôr-thŏp´tē-rȧ).—An order of straight-winged insects, as cockroaches, grasshoppers, etc.
Oviparous (ō-vĭp´ȧ-rŭs).—Applied to animals which produce eggs instead of living young.
Ovipositor (ō´vĭ-pŏz´ĭ-tẽr).—In insects an organ by which eggs are deposited in wood, etc.