See Also: colourless(dictionary)

acraldehyde (iou) and colourless (oh)


acraldehyde (iou)



acraldehyde noun. M19.
[formed as ACRID + ALDEHYDE.]
Chemistry. Orig., a compound related to acetaldehyde, of formula C4H8O2 (probably aldol). Now = ACROLEIN.

colourless (oh)



having no colour
::a colourless, odourless gas
if your face, hair, eyes, skin, or lips are colourless, they are very pale, usually because you are ill or frightened
not interesting or exciting
-synonym dull dull
::his colourless personality
-- colourlessly adv