1. (n.) of or pertaining to an umbilicus, or umbilical cord; umbilic.

2. (n.) Pertaining to the center; central.

ascending back back-flowing backward centermost central centralized centric centroidal centrosymmetric concentrated descending down-trending downward drifting flowing fluent flying geocentric going gyrational gyratory key middle middlemost midmost mounting omphalic passing pivotal plunging progressive reflowing refluent regressive retrogressive rising rotary rotational rotatory running rushing sideward sinking soaring streaming umbilical up-trending upward