| DTIE | Doppler tissue imaging energy |
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| DTIV | Doppler tissue imaging velocity |
| DUF | Doppler ultrasonic flowmeter; drug use forecast |
| DVI | deep venous insufficiency; diastolic velocity integral; digital vascular imaging; Doppler velocity i... |
| ICDS | International Cardiac Doppler Society |
| opponent colour | Pairs of colour that share colour channels in the retina (red-green, blue-yellow, black-white). (05 Mar 2000) |
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| tone colour | The distinguishing quality of a sound, by which one may determine its source. Synonym: tone colour. Origin: Fr. (05 Mar 2000) |
| extrinsic colour | Colour applied to the external surface of a dental prosthesis. (05 Mar 2000) |
| eye colour | Colour of the iris. (12 Dec 1998) |
| Young-Helmholtz theory of colour vision | A theory that there are three colour-perceiving elements in the retina: red, green, and blue. Perception of other colours arises from the combined stimulation of these elements; deficiency or absence of any one of these elements results in inability to perceive that colour and a misperception of any other colour of which it forms a part. Synonym: Helmholtz theory of colour vision. (05 Mar 2000) |
| Farnsworth-Munsell colour test | A test for colour perception; the task is to arrange 84 colour disks (in four separate racks of 20-22 disks) in a sequence with minimal separation of hue between adjacent disks. (05 Mar 2000) |