(botany) One of the spots upon a stem where buds and intercalary meristems occur, usually marking the end of a season's growth. / (computing theory) A node, in a tree, that has no children.

(anatomy) The retropharyngeal lymph node found at the base of the fossa of Rosenmüller.

(anatomy) A lymph node in the left supraclavicular fossa that may indicate cancer in the abdomen if it is hard and enlarged.

(pathology) A hard or bony swelling that can develop in the distal interphalangeal joints, a sign of osteoarthritis.

(anatomy) The uppermost of the deep inguinal lymph nodes located in the femoral canal.

(anatomy) A group of cells located in the wall of the right atrium of the heart that originates the impulses stimulating the heartbeat.

(anatomy) Synonym of sinoatrial node.

(anatomy) Abbreviation of sinoatrial node.

(medicine) a small structure in the heart, located in the Koch's triangle, near the coronary sinus on the interatrial septum

(astronomy) The point in an orbit at which a body passes the ecliptic plane going north.