Muscle tone. Definition. noun. (1) The muscle in a steady partially contracted state caused by the successive flow of nerve impulses. (2) The amount of tension or resistance to movement in a muscle. Supplement. Muscle tone or tonus helps in maintaining body posture.
Hydronephrosis is the distention of the pelvis and calyces of one or both kidneys, resulting in thinning of the renal tubules because of obstructed urinary flow. When the obstruction is a stone or kink in one of the ureters, only one kidney is damaged.
What is the medical term meaning dilation of the kidneys? Hydronephrosis. A related term meaning dilatation of the renal pelvis to a lesser degree is pyelectasis, both are the result of an obstruction of the kidneys and/or the uretâ¦er, such as congenital stenosis, a calculus or stone, etc. Pyelocaliectasis is dilation of the renal pelvis and calyx.