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late 14c., from Old French liquide "liquid, running," from Latin liquidus "fluid, liquid, moist," figuratively "flowing, continuing," from liquere "be fluid," related to liqui "to melt, flow," from PIE *wleik- "to flow, run." Of sounds, from 1630s (the Latin word also was used of sounds). Financial sense of "capable of being converted to cash" is first recorded 1818.
"a liquid substance," 1709, from liquid (adj.). Earlier it meant "sound of a liquid consonant" (1520s).
liquid liq·uid (lĭk'wĭd)
The state of matter in which a substance exhibits a characteristic readiness to flow, little or no tendency to disperse, and relatively high incompressibility.
Matter or a specific body of matter in this state.
Of or being a liquid.
Having been liquefied, especially melted by heating or condensed by cooling.
Flowing readily; fluid.
One of four main states of matter, composed of molecules that can move about in a substance but are bound loosely together by intramolecular forces. Unlike a solid, a liquid has no fixed shape, but instead has a characteristic readiness to flow and therefore takes on the shape of any container. Because pressure transmitted at one point is passed on to other points, a liquid usually has a volume that remains constant or changes only slightly under pressure, unlike a gas.