proximal Definition

situated close to : proximate

next to or nearest the point of attachment or origin, a central point, or the point of view; especially : located toward the center of the body

of, relating to, or being the mesial and distal surfaces of a tooth

the convoluted portion of the vertebrate nephron that lies between Bowman's capsule and the loop of Henle and functions especially in the resorption of sugar, sodium and chloride ions, and water from the glomerular filtrate —called also proximal tubule