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A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.

To give forth a play of colors, like the opal.

light from the interior of a mineral, as in the moonstone; the state or quality of being opalescent.

Reflecting a milky or pearly light from the interior; having an opaline play of colors.

Of, pertaining to, or like, opal in appearance; having changeable colors like those of the opal.

To convert into opal, or a substance like opal. Lyell.

A picture taken on "milky" glass.

Having the ovule inverted, but with the attachment near the middle of one side; half anatropous.

Having the ovule inverted at an early period in its development, so that the chalaza is as the apparent apex; -- opposed to orthotropous. Gray.

At the extremity most remote from the hilum, as the embryo, or inverted with respect to the seed, as the radicle. Lindley.

Of or pertaining to an archbishop; as, Canterbury is an archiepiscopal see.

The station or dignity of an archbishop; archiepiscopacy. Fuller.

A massive mineral, greenish in color, and opal-like in appearance. It is essentially a hydrous silicate of iron.

Pertaining to a chorepiscopus or his change or authority.

A resinous substance flowing spontaneously from trees of Zanzibar, Madagascar, and South America (Trachylobium Hornemannianum, T. verrocosum, and Hymenæa Courbaril), and dug from earth where forests have stood in Africa; -- used chiefly in making varnishes. Ur

The yellowish, fragrant balsam yielded by the sweet gum; also, the tree itself.

Governed by bishops; as, an episcopal church.

Pertaining to bishops, or government by bishops; episcopal; specifically, of or relating to the Protestant Episcopal Church.

The doctrine and usages of Episcopalians; episcopacy.

By episcopal authority; in an episcopal manner.