observable

observe +‎ -able

observable (comparative more observable, superlative most observable)

1. Able to be observed.

   The strange new star was at the edge of the observable universe.

   • 2004, Lukacs, John, A New Republic: A History of the United States in the Twentieth Century:

     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.

   • 2008, Teece, David J., Technological Know-how, Organizational Capabilities, and Strategic Management:

     Although intellectual property rights, such as patents, are highly observable, they are mostly limited to product technologies. Process technologies, or the routines endemic in the firm's production, are not readily observable, and thus cannot be easily imitated.

2. Deserving to be observed; worth regarding; remarkable.

• (able to be observed): noticeable, perceivable; see also Thesaurus:perceptible
• (deserving to be observed): eminent, noteworthy; see also Thesaurus:notable

observable (plural observables)

1. (physics) 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.

observer +‎ -able

observable (plural observables)

1. observable

• observabilité

observable (plural observables)

1. observable