Alternative form of contact tracing.

(computer graphics) A Monte Carlo method of rendering images of three-dimensional scenes such that the global illumination is faithful to reality.

(chemistry) A chemical element present in a sample in very small quantities.

(paleontology) A type of fossil reflecting the reworking of sediments and hard substrates by organisms, rather than the physical remains of the organism itself. This includes structures such as burrows, trails, impressions, coprolites and borings.

plural of trace fossil

(geology) A line drawn on a map to represent the position of a fault line.

plural of trace italienne

A star fort.

(programming) A hierarchical trace of the function calls made by a program, used in debugging.

(botany) An extension of vascular tissue from a plant's stem into a nearby leaf, resulting in a leaf gap in the plant's stele.