Select Page

Archives: Dictionary


/ˌnēōˈnātl/ Adjective 1. Of or pertaining to the period of time immediately following birth, or to the newborn. ( 2. of, relating to, or affecting the newborn and especially the human infant during the first month after birth. ( 3. (Pediatrics) Pertaining to the first four weeks after birth. ( Word origin: From Greek neo-, comb. form of neos “new, young, youthful; fresh, strange; lately, just now,” + from Latin natalis “pertaining to birth or origin,” from natus, past participle of nasci “to be...

Read More


Noun 1. The cortical part of the neencephalon. ( 2. The phylogenetically new part of the cerebral cortex that develops from the area between the piriform lobe and the hippocampus, comprises the non-olfactory region of the cortex, and attains its maximum development in humans where it makes up the greater part of the cerebral hemisphere on each side. ( 3. A part of the brain of mammals. It is the outer layer of the cerebral hemispheres, and made up of six layers, labelled I to VI (with VI being the innermost and I being the outermost). It is part of the cerebral cortex (along with the archicortex and paleocortex, which are cortical parts of the limbic system). In all mammals, it is involved in “higher functions” such as sensory perception, generation of motor commands, spatial reasoning, conscious thought and language. ( Syn: neocortex, isocortex Word origin: Latin for “new...

Read More


/nərv/ Noun, pl. nerves (Anatomy) 1. An enclosed, cable-like bundle of axons (the long, slender projections of neurons) in the peripheral nervous system. A nerve provides a common pathway for the electrochemical nerve impulses that are transmitted along each of the axons to peripheral organs. ( 2. Any of the cordlike bundles of fibers made up of neurons through which sensory stimuli and motor impulses pass between the brain or other parts of the central nervous system and the eyes, glands, muscles, and other parts of the body. Nerves form a network of pathways for conducting information throughout the body. ( 3. One of the whitish and elastic bundles of fibres, with the accompanying tissues, which transmit nervous impulses between nerve centers and various parts of the animal body. An ordinary nerve is made up of several bundles of nerve fibres, each bundle inclosed in a special sheath (the perineurium) and all bound together in a connective tissue sheath and framework (the epineurium) containing blood vessels and lymphatics. ( (Zoology) 1. A bundle of neurons with their connective tissue sheaths, blood vessels and lymphatics. ( 2. One of the nervures, or veins, in the wings of insects. ( (Botany) 1. A vein in a leaf; a grain in wood. ( 2. A vein or rib in the wing of an insect. ( 3. One of the principal fibrovascular bundles...

Read More

Struggling in Biology?

Are You Premed?

Confused about the MCAT? Not sure how to prepare? This guide will show you how