caret(n = noun.communication) - a mark used by an author or editor to indicate where something is to be inserted into a text;
is a kind of mark

   A mark [^] used by writers and proof readers to indicate that something is interlined above, or inserted in the margin, which belongs in the place marked by the caret. [1913 Webster]

   The hawkbill turtle. See Hawkbill. [1913 Webster]

caret, n. a mark (*,*) indicating a proposed insertion in printing or writing.

Etymology:
L, = is lacking

VB  be insufficient, not suffice, come short of, run dry, want, lack, need, require, caret, be in want, live from hand to mouth, render insufficient Adj, drain of resources, impoverish, stint, put on short allowance, do insufficiently, scotch the snake.

N  incompleteness, deficiency, short measure, shortcoming, insufficiency, imperfection, immaturity, half measures, defect, deficit, defalcation, omission, caret, shortage, interval, break, noncompletion, missing link, missing piece, missing part, gap, hole, lacuna, incomplete, imperfect, unfinished, uncompleted &c (complete), defective, deficient, wanting, lacking, failing, in default, in arrear, short of, hollow, meager, lame, halfand-half, perfunctory, sketchy, crude, mutilated, garbled, docked, lopped, truncated, in progress, in hand, going on, proceeding, incompletely, by halves, caetera desunt, caret, incompleteness, deficiency, short measure, shortcoming, insufficiency, imperfection, immaturity, half measures, defect, deficit, defalcation, omission, caret, shortage, interval, break, noncompletion, missing link, missing piece, missing part, gap, hole, lacuna, incomplete, imperfect, unfinished, uncompleted &c (complete), defective, deficient, wanting, lacking, failing, in default, in arrear, short of, hollow, meager, lame, halfand-half, perfunctory, sketchy, crude, mutilated, garbled, docked, lopped, truncated, in progress, in hand, going on, proceeding, incompletely, by halves, caetera desunt, caret.