umbilic
Um*bil"ic, n. Etym: [From L. umbilicus: cf. F. ombilic. See Navel.] 1. The navel; the center. [Obs.] "The umbilic of the world." Sir T. Herbert. 2. (Geom.) Defn: An umbilicus. See Umbilicus, 5 (b). Um*bil"ic, a. (Anat.) Defn: See Umbilical, 1.