A branching point on a dendrogram, especially on a cladogram or phylogenetic tree.
The point along a fault at which the direction of apparent displacement changes. It can occur, for instance, at the intersection of a lateral fault with a fold.
(a) The uncalcified proximal extremity of a branch froming an articulation in a jointed colony of cheilostome bryozoans. (b) A knob, protuberance, or thickened or swollen part of an animal, such as a small boss at the end of a foraminiferal pillar.
That point on a standing wave at which the vertical motion is least and the horizontal velocity is greatest. It is also associated with seiches. Ant: antinode

Glossary of Geology, Third Ed. Bates and Jackson. American Geological Institute, 1987.