(countable, uncountable, mineralogy) A semitransparent, uncrystallized silicate mineral and semiprecious stone, presenting various tints in the same specimen, with colors delicately arranged and often curved in parallel alternating dark and light stripes or bands, or blended in clouds; various authorities call it a variety of chalcedony, a variety of quartz, or a combination of the two.

(obsolete) On the way; agoing.

plural of agate

(transitive) To convert a living thing into the form of an agate; to fossilize.

Third-person singular simple present indicative form of agatize

present participle of agatize

simple past tense and past participle of agatize

formation of agate

plural of agatization

(mineralogy) A variety of agate with brown, black, or green moss-like or dendritic markings, due in part to manganese oxide.