[ uh b-zur-vuh-buh l ]
/ əbˈzɜr və bəl /
Origin of observable
ob·serv·a·bil·i·ty, ob·serv·a·ble·ness, nounob·serv·a·bly, adverbnon·ob·serv·a·ble, adjectivenon·ob·serv·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin and History for nonobservable
c.1600, from Latin observabilis "remarkable, observable," from observare (see observe). Related: Observably; observability.
Online Etymology Dictionary, © 2010 Douglas Harper
Science definitions for nonobservable
[ əb-zûr′və-bəl ]
A measurable property of a physical system, such as mass or momentum. In quantum mechanics, observables correspond to mathematical operators used in the calculation of measurable quantities. Operators that do not commute, having a nonzero commutator, correspond to observables that cannot be precisely measured at the same time, such as momentum and position. See also uncertainty principle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.