gap-graded
21nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… …
22narrow — [[t]næ̱roʊ[/t]] ♦♦ narrower, narrowest, narrows, narrowing, narrowed 1) ADJ GRADED Something that is narrow measures a very small distance from one side to the other, especially compared to its length or height. ...through the town s narrow… …
23Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
24close — I SHUTTING OR COMPLETING ♦ closes, closing, closed (Pronounced [[t]klo͟ʊz[/t]] in close 1 and 3, and [[t]klo͟ʊs[/t]] in close 2 and 4.) 1) V ERG When you close something such as a door or lid or when it closes, it moves so that a hole, gap, or… …
25education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …
26long — I [[t]lɒ̱ŋgɪst, AM lɔ͟ːŋgɪst[/t]] TIME ♦ longest 1) ADV GRADED: ADV with v, oft ADV adv/prep Long means a great amount of time or for a great amount of time. Repairs to the cable did not take too long... Have you known her parents long?... I… …
27poor — [[t]pʊ͟ə(r), pɔ͟ː(r)[/t]] ♦♦ poorer, poorest 1) ADJ GRADED Someone who is poor has very little money and few possessions. The reason our schools cannot afford better teachers is because people here are poor... He was one of thirteen children from …
28Neuron — This article is about cells in the nervous system. For other uses, see Neuron (disambiguation). Brain cell redirects here. For other uses, see Glial cell. Neuron: Nerve Cell …
29Semiconductor — Citations missing|date=March 2008A semiconductor is a solid material that has electrical conductivity in between a conductor and an insulator; it can vary over that wide range either permanently or dynamically. [. They are used in many… …
30Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… …
