An abbreviation for ‘before present,’ commonly used in dating archaeological and geological events.

Relating to the arm or to the upper part of the arm.

To move by swinging from one arm to the other, as seen in gibbons and some other primates.

The method of movement in some primates and other animals, where the individual swings from tree branch to tree branch…

A phylum of marine invertebrates with a hard, bivalve shell and a lophophore for feeding, often mistaken for bivalves.

Having short fingers or toes.

Referring to teeth with short crowns, typically found in some mammals, such as humans.

A modified leaf, typically smaller or different in shape, that is associated with a flower or inflorescence.

A small bract located beneath a flower or along the pedicel of a flower in some plants.

Describing an organism or species that evolves slowly over time.