missing link(n = noun.person) ape-man - hypothetical organism formerly thought to be intermediate between apes and human beings; Array
is a kind of primitive, primitive person

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.

N  completion, accomplishment, achievement, fulfillment, performance, execution, despatch, dispatch, consummation, culmination, finish, conclusion, close, terminus, winding up, finale, denouement, catastrophe, issue, upshot, result, final touch, last touch, crowning touch, finishing touch, finishing stroke, last finish, coup de grace, crowning of the edifice, coping-stone, keystone, missing link, superstructure, ne plus ultra, work done, fait accompli, elaboration, finality, completeness, completing, final, concluding, conclusive, crowning, exhaustive, done, completed, done for, sped, wrought out, highly wrought, thorough, ripe, completely, to crown all, out of hand, the race is run, actum est, finis coronat opus, consummatum est, c'en est fait, it is all over, the game is played out, the bubble has burst, aussitot dit aussitot fait, aut non tentaris aut perfice.

data link, link, link motion, link trainer, link up, missing, radio link, relay link, weak link