Hibernation (hī-bẽr-nā´shŭn).—The state of animals that sleep throughout winter.
Hymenoptera (hī-mē-nŏp´te-rȧ).—An order of insects with two pairs of membraneous wings.
Ichthyology (ĭk-thĭ-ŏl´ō-jy).—The science of fishes, or that part of zoology which treats of fishes, their structure, habits, etc.
Infusoria (ĭn´fû-sō´rĭ-ȧ).—Minute animals that live in stagnant water. A class of Protozoa.
Insectivora (ĭn´sĕk-tĭv´ô-rȧ).—Insect-eaters. They comprise the shrew, mole, hedgehog, etc.
Invertebrate (ĭn-vēr´te-brāt).—Animals that have no vertebral column, or bones properly so called.
Larva (lär´vȧ).—The second stage of the insect, a caterpillar, grub, or maggot.
Mandible (măn´dĭ-bl).—The upper jaw of insects; the lower jaw of vertebrates.
Marsupial (Mär-su´pĭ-al).—An order of mammals that carry their young in a pouch, as the kangaroo.
Mollusc (mŏl’lŭsk).—Animals whose bodies are soft and pulpy.