observable [ əb zʉrv] ′ə bəl
adjective that can be observed; visible; discernible; noticeable deserving of attention; noteworthy that can or must be kept or celebrated: an observable holiday Origin: L observabilis Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
adjective Possible to observe: observable phenomena; an observable change in demeanor. See Synonyms at noticeable. Deserving or worthy of note; noteworthy: an observable anniversary. noun
A physical property, such as weight or temperature, that can be observed or measured directly, as distinguished from a quantity, such as work or entropy, that must be derived from observed quantities.
Related Forms: The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. observable - Science Definition
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
, having a nonzero
, correspond to observables that cannot be precisely measured at the same time, such as momentum and position. See also
The American Heritage® Science Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.