twain definition by Webster's New World
Origin: Middle English twene ; from Old English twegen, nominative and amp; accusative masculine form of twa, two
twain definition by American Heritage Dictionary
noun, adj. & pron.
Origin: Middle English tweien, twaine, from Old English twēgen; see dwo- in Indo-European roots.
twain - Computer Definition
(Technology Without An Interesting Name) A programming interface that lets a graphics application, such as an image editing program or desktop publishing program, activate a scanner, frame grabber or other image-capturing device.