Noun | 1. | ![]() tubule - a small tube malpighian body, malpighian corpuscle, renal corpuscle - the capsule that contains Bowman's capsule and a glomerulus at the expanded end of a nephron kidney - either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine; "urine passes out of the kidney through ureters to the bladder" |