observable

[uh b-zur-vuh-buh l]

See more synonyms for observable on Thesaurus.com

adjective

capable of being or liable to be observed; noticeable; visible; discernible: an observable change in attitude.
worthy or important enough to be celebrated, followed, or observed: an observable holiday.
deserving of attention; noteworthy.

Origin of observable

1600–10; < Latin observābilis remarkable, equivalent to observā(re) to observe + -bilis -ble

Related formsob·serv·a·bil·i·ty, ob·serv·a·ble·ness, nounob·serv·a·bly, adverbnon·ob·serv·a·ble, adjectivenon·ob·serv·a·bly, adverbun·ob·serv·a·ble, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for observable

Contemporary Examples

The observable Universe contains around 100 billion large galaxies and a comparable number of supermassive black holes.
The Black Hole Tango
Matthew R. Francis
November 24, 2014
All ISIS logistics and dispositions in the field are observable by drone and satellite.
How a Real Air War Could Demolish ISIS
Clive Irving
August 23, 2014
Theory: a scientifically acceptable principle explaining a set of observable facts.
What's Wrong With Republicans?
November 9, 2012
Global warming is an observable fact, and transportation emissions are the second largest contributor to the problem.
Pancakes' New Topper
Stacey Slate
December 8, 2009
How has this soldier demonstrated recurring actions, patterns, or observable behaviors that might indicate his real beliefs?
Why We Should Screen Muslim Soldiers
Ken Allard
November 27, 2009

Historical Examples

Between the "wondering" and the noun there had been an observable pause.
Ester Ried Yet Speaking
Isabella Alden
On the 15th of September, 17—, an unusual stir was observable in our village.
Wilson's Tales of the Borders and of Scotland, Volume VI
Various
The only other observable symptom was slightly increased thirst.
Pariah Planet
Murray Leinster
It is observable that he does not absolutely deny that there is an opposite of Being.
Sophist
Plato
A tendency to a paradoxical manner of statement is also observable.
Laws
Plato

Word Origin and History for observable

adj.

c.1600, from Latin observabilis "remarkable, observable," from observare (see observe). Related: Observably; observability.

observable in Science

observable

[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.

observable

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Related Words

Examples from the Web for observable

Contemporary Examples

The observable Universe contains around 100 billion large galaxies and a comparable number of supermassive black holes.

All ISIS logistics and dispositions in the field are observable by drone and satellite.

Theory: a scientifically acceptable principle explaining a set of observable facts.

Global warming is an observable fact, and transportation emissions are the second largest contributor to the problem.

How has this soldier demonstrated recurring actions, patterns, or observable behaviors that might indicate his real beliefs?

Historical Examples

Between the "wondering" and the noun there had been an observable pause.

On the 15th of September, 17—, an unusual stir was observable in our village.

The only other observable symptom was slightly increased thirst.

It is observable that he does not absolutely deny that there is an opposite of Being.

A tendency to a paradoxical manner of statement is also observable.

Word Origin and History for observable

adj.

observable

Origin of observable