Webster Dictionary (4.00 / 1 vote) Rate this definition: Proficiency (noun) the quality of state of being proficient; advance in the acquisition of any art, science, or knowledge; progression in knowledge; improvement; adeptness; as, to acquire proficiency in music
Additional terms include: 1  retrocessed uterus: both the superior and inferior ends of the uterus are pushed posteriorly.  severely anteflexed uterus: the uterus is in the same position as normal and bends in the same direction (concave is anterior) but the bend is much more pronounced.
Definition of utricle. : any of various small pouches or saccate parts of an animal or plant: such asa : the part of the membranous labyrinth of the inner ear into which the semicircular canals openb : a small usually indehiscent one-seeded fruit with thin membranous pericarp.