3. One of the ultimate parts which are variously combined in anything; as, letters are the elements of written language; hence, also, a simple portion of that which is complex, as a shaft, lever, wheel, or any simple part in a machine; one of the essential ingredients of any mixture; a constituent part; as, quartz, feldspar, and mica are the elements of granite. The simplicity which is so large an element in a noble nature was laughed to scorn. Jowett (Thucyd.).
4. (a) One out of several parts combined in a system of aggregation, when each is of the nature of the whole; as, a single cell is an element of the honeycomb. (b) (Anat.) One of the smallest natural divisions of the organism, as a blood corpuscle, a muscular fiber.
5. (Biol.)
Defn: One of the simplest essential parts, more commonly called cells, of which animal and vegetable organisms, or their tissues and organs, are composed.
6. (Math.) (a) An infinitesimal part of anything of the same nature as the entire magnitude considered; as, in a solid an element may be infinitesimal portion between any two planes that are separated and indefinitely small distance. In the calculus, element is sometimes used as synonymous with differential. (b) Sometimes a curve, or surface, or volume is considered as described by a moving point, or curve, or surface, the latter being at any instant called an element of the former. (c) One of the terms in an algebraic expression.
7. One of the necessary data or values upon which a system of calculations depends, or general conclusions are based; as, the elements of a planet's orbit.
8. pl.
Defn: The simplest or fundamental principles of any system in philosophy, science, or art; rudiments; as, the elements of geometry, or of music.
9. pl.
Defn: Any outline or sketch, regarded as containing the fundamental ideas or features of the thing in question; as, the elemental of a plan.