observable
adjective
- In physics, a dynamic variable that can be measured
noun
- In physics, a dynamic variable that can be measured
Wiktionary
Pronunciation: /əbˈzɜː.və.bəl/ / [əbˈzɜː.və.bɫ̩] / /əbˈzɝ.və.bəl/
adj
Etymology: Etymology tree English observe Proto-Indo-European *-tḗr Proto-Indo-European *-dʰlom Proto-Indo-European *-dʰlis Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English observable From observe + -able.
- Able to be observed.
“The strange new star was at the edge of the observable universe.”
“In 1913, in the same year that Mother's Day became a nationally observable holiday, the American people passed another milestone: for the first time in American history more than one person in one thousand was divorced.”
- Deserving to be observed; worth regarding; remarkable.
“Both were observable figures; one a personable individual of foreign cut, the other—obviously in spite of his well-wrapped-up form—a pronounced cripple.”
noun
Etymology: Etymology tree English observe Proto-Indo-European *-tḗr Proto-Indo-European *-dʰlom Proto-Indo-European *-dʰlis Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English observable From observe + -able.
- Any physical property that can be observed and measured directly and not derived from other properties
“Temperature is an observable but entropy is derived.”
“In quantum mechanics, observables correspond to Hermitian operators. Also, they act a lot like random variables. Taking their expected value one may recover something resembling a classical observable.”