■ adjective
1》 conforming to a standard; usual, typical, or expected.
2》 technical intersecting a given line or surface at right angles.
3》 Medicine containing the same salt concentration as the blood.
↘ Chemistry, dated (of a solution) containing one gram-equivalent of solute per litre.
4》 Geology denoting a fault in which a relative downward movement occurred in the strata on the upper side of the fault plane.
■ noun
1》 the ~ state or condition: her temperature was above ~.
2》 technical a line at right angles to a given line or surface.
Origin
C17: from L. ~is , from norma (see norm ).