Unip´arous, a. Producing but one young. Same as monotokous.
Upper Back. (58.) See Interscapilium.
Upper Jaw. (10.) See Maxilla.
Upper Parts. (5.) See Notæum.
Upper Tail-coverts. (72.) See Calypteria.
Upper Wing-coverts. (84.) See Tectrices.
Uræ´um, n. Hinder half of a bird. (8.) (Little used.)
Ure´a, n. A certain component of urine.
Ure´ter, n. Tube conveying urine from kidney to cloaca.
Ure´thra, n. Groove in penis for direction of the discharge.