1776, "pertaining to dancing" (saltatory in the same sense is by 1745), from Latin saltatorius "pertaining to dancing," from saltare "to hop, to dance," frequentative of salire "to leap" (see salient (adj.)). By 1832 in zoology, "leaping frequently or habitually; fitted for leaping; characterized by or pertaining to leaping." Related: Saltatorially.
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