optically

adv

Etymology: Etymology tree English optic Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English optical Proto-Indo-European *leyg-der. Proto-Germanic *līkąder. Proto-Germanic *-līkaz Proto-Germanic *-ê Proto-Germanic *-līkê Proto-West Germanic *-līkē Old English -līċe Middle English -ly English -ly English optically From optical + -ly.

1. regarding or using optics

   “The picture is seen optically through the lens, as in many photo cameras.”

   “The microscopically small crystals often obtained by very rapid cooling of the hot solution, appeared to be no crystals of the optically active form either; they were rhombic individuals exhibiting prismatic, domatic and basal facets, of a new hydrate of the racemic compound, probably at higher temperatures stable, and containing less water of crystallization.”