Anterior cruciate ligament: A ligament in the knee that crosses from the underside of the femur (the thigh bone) to the top of the tibia (the bigger bone in the lower leg). Abbreviated ACL. Injuries to the ACL can occur in a number of situations, including sports, and can be quite serious, requiring surgery.
The anterior cruciate ligaments, one on either side of the knee, are so called because they cross each other in front of the knee. “Cruciate” taken from the Latin “crux” for “cross” means “in the form of a cross.” See: Anterior cruciate injury.
- Anterior pituitary
Anterior pituitary: The front portion of the pituitary, a small gland in the head called the master gland. Hormones secreted by the anterior pituitary influence growth, sexual development, skin pigmentation, thyroid function, and adrenocortical function. These influences are exerted through the effects of pituitary hormones on other endocrine glands except for growth hormone which acts […]
- Anterior tongue
Anterior tongue: The front two-thirds of the tongue. In contrast to the base of the tongue, which is the back third. The distinction between the anterior and base of the tongue reflects the fact that they are of different embryological origin. The distinction also matters as regards cancer. See: Tongue cancer.
Antero-: Prefix signifying before, earlier, front. From the Latin anterior meaning before.
Anterograde: Moving forward or extending forward. Anterograde memory is memory for what occurs after an event such as an accident. Also called antegrade. From the Latin antero- + gredior (to step or go).
- Anterograde memory
Anterograde memory: Loss of short-term memory with retention of memories from the distant past (long-term memory).