| scalar | <mathematics> In the quaternion analysis, a quantity that has magnitude, but not direction; distinguished from a vector, which has both magnitude and direction. Source: Websters Dictionary (01 Mar 1998) |
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| scalar electrocardiogram | Electrocardiographic lead output that can be displayed on one plane of the body in contradistinction to vector electrocardiogram in which the display is on two or more planes. (05 Mar 2000) |
| scalaria | <zoology> Any one of numerous species of marine gastropods of the genus Scalaria, or family Scalaridae, having elongated spiral turreted shells, with rounded whorls, usually crossed by ribs or varices. The colour is generally white or pale. Synonym: ladder shell, and wentletrap. See Ptenoglossa, and Wentletrap. Origin: L, flight of steps. Source: Websters Dictionary (01 Mar 1998) |
| scalariform | Having a ladder-like pattern. (09 Oct 1997) |