A small mass or swelling, often used to describe abnormal growths or tumors.

Shaped like a crescent or half-moon, often used to describe certain anatomical structures such as bones.

An organ responsible for gas exchange, taking in oxygen and expelling carbon dioxide in vertebrates.

A hormone produced by the pituitary gland that stimulates ovulation in females and testosterone production in males.

A hormone that stimulates the secretion of progesterone in the corpus luteum, involved in maintaining pregnancy.

A blood group system based on antigens found on red blood cells, related to the Lutheran antigen.

A genus of sandflies, some of which are vectors of Leishmania parasites responsible for leishmaniasis.

A colorless fluid containing white blood cells, that circulates through the lymphatic system and helps with immune function.

A small, bean-shaped structure that filters lymph and houses lymphocytes, part of the immune system.

A rare and aggressive cancer of the lymphatic vessels.