(photography, television) Having great contrast between light and dark areas (of a subject or photograph).

plural of contrastivist

(philosophy) One who subscribes to contrastivism.

(philosophy) An epistemological theory suggesting that knowledge attributions have a ternary structure of the form "S knows that p rather than q", in contrast to the traditional view whereby knowledge attributions have a binary structure of the form "S knows that p".

plural of contrastimulant

(pharmacology) Any agent that counteracts a stimulant.

(pharmacology) That reverses the effect of a stimulant.

Lacking contrast

(rare) Absence of contrast.

radiography after administration of a contrast agent