level

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Related to no observed adverse effect level: no observed effect level, Lowest Observed Adverse Effect Level

level

(Balance), noun aligned, equal, equal on a plane, even, exact, in the same plane, matched, of the same height, same, standard, straight, uniform

level

(Grade), noun advanced status, class, freshman, graduate, junior, program, senior, seniority, sophomore, status, underclassman, undergraduate, year, year of graduation, year of studies

level

(Plane), noun bank, deep slope, distance uppard, easy slope, elevation, equal, exact, flat, flat surface, flattened, flush, grade, gradient, inclination, incline, inclined plane, on a line, parallel, pitch, slope, steep slope
See also: adjust, balance, coequal, commensurable, destroy, efface, extirpate, obliterate, pillage, regulate, subvert