Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
a turn or sharp curve in a cordlike structure.
capillary l's minute endothelial tubes that carry blood in the papillae of the skin.
closed loop a system in which the input to one or more of the subsystems is affected by its own output.
Henle's loop the U-shaped part of the nephron extending from the proximal to the distal convoluted tubule.
ileal loop ileal conduit.
Lippes loop a form of intrauterine contraceptive device.
open loop a system in which an input alters the output, but the output has no effect on the input.
[Jack (Jacob) Lippes, U.S. obstetrician, b. 1924]
A serpentine-shaped intrauterine contraceptive device no longer used in the U.S.