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activity US English

The condition in which things are happening or being done

activity US Thesaurus

there was a lot of activity in the area

optical activity US English

The property (displayed by solutions of some compounds, notably many sugars) of rotating the plane of polarization of plane-polarized light

specific activity US English

The activity of a given radioisotope per unit mass

displacement activity US English

An animal or human activity that seems inappropriate to the context, such as head-scratching when one is confused, considered to arise unconsciously when a conflict between antagonistic urges cannot be resolved

beehive US English

A busy, crowded place

activity coefficient in activity US English

A thermodynamic quantity representing the effective concentration of a particular component in a solution or other system, equal to its concentration multiplied by an activity coefficient