A branch of ichnology concerned with the study of modern traces (such as burrows, trails, etc.) created by organisms on and within fresh sediments

A bird of the species Otis tarda, native to Iberia, but found at least seasonally in many parts of Eurasia.

(geometry) Of a polygon: able to be divided into triangles of equal area.

(organic chemistry) A monoterpene ketone that is a major constituent of the essential oil of wormwood, C₁₀H₁₆O; thujone.