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To heap up. [Obs.]

A heaping up; accumulation. [R.] Johnson.

Heaped up; tending to heap up.

A salt formed by the union of acetic acid with a base or positive radical; as, acetate of lead, acetate of potash.

Combined with acetic acid.

The act of making acetous or sour; the process of converting, or of becoming converted, into vinegar.

An agate. [Obs.] Evelyn.

A genus of land snails, often large, common in the warm parts of America and Africa.

Purveyor; acater. [Obs.] Chaucer.

Not possessing a mantle; -- said of certain gastropods.

Uncolored; not absorbing color from a fluid; -- said of tissue. Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced…

In an achromatic manner.

Achromatism.

Tissue which is not stained by fluid dyes. W. Flemming.

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

The act or process of achromatizing.

To deprive of color; to make achromatic.

Color blindness; inability to distinguish colors; Daltonism.

Lacking, or deficient in, color; as, achromatous blood.

Marked with fine irregular streaks as if scratched by a needle. Lindley.