معنی کلمه :‌ achromatism

The state or quality of being achromatic; as, the achromatism of a lens; achromaticity.

A member or follower of the "liberal" party, headed by Elias Hicks, which, because of a change of views respecting the divinity of Christ and the Atonement, seceded from the conservative portion of the Society of Friends in the United States, in 1827.