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"mark in writing to show where something is to be inserted," 1680s, from Latin caret "there is lacking," 3rd person singular indicative of carere "to lack" (see caste).
^ Common: hat; control; uparrow; caret; ITU-T: circumflex. Rare: chevron; INTERCAL: shark (or shark-fin); to the ("to the power of"); fang; pointer (in Pascal).