Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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-er1 one that performs or is associated with (such) an action, activity, or thing. [4 definitions]
-or1 a variant of -er1.
-or2 activity; quality; condition; characteristic.
clocklike very regular, punctual, and dependable.
CO1 abbreviation of "Colorado," a western U.S. state bordered by Wyoming, Kansas, New Mexico, and Utah.
col a pass or gap between mountains.
col-1 together; with; jointly.
col-2 variant of colo-.
Col. abbreviation of "Colonel," in the U.S. Army, Air Force, and Marines, a rank above lieutenant colonel and below brigadier general (used in a proper name).
colo- colon or large intestine.
geologic of, pertaining to, or according to geology.
glycol a chemical compound used as a solvent and as an antifreeze in automobiles; ethylene glycol. [2 definitions]
local color the distinctive sights, customs, manners, speech, and the like that are characteristic of a particular place or period, either as observed in reality or depicted in literature.
or used to indicate alternatives. [3 definitions]
OR1 abbreviation of "Oregon," a northwestern U.S. state on the Pacific coast between Washington and California.
OR2 abbreviation of "operating room."