Breadcrumb Home > Dictionary > Index O optical pumping: Meaning and Definition of Find definitions for: op'tical pump'ing Pronunciation: [key] — Physics, Optics. Physics,Optics. a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to those levels. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. optical printer optical rotation TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: jingoism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language