An option which can be exercised at the strike price at anytime before the expiry date....more on American option
An option that may be exercised at any time up to and including the expiration date. Related: European option
An option that may be exercised at any time up to and including the expiration date. Related: European option 
An option which may be exercised any time between its initiation and expiration dates (inclusive).
An option that may be exercised at any time up to and including the expiration date. Related
An option which may be exercised at any time prior to expiration. 
An option that may be exercised on any day up to and including the expiry date.
An option, normally an OTC option on physical, which can be declared at any time prior to expiration.
An option that may be exercised on any day up to and including the expiry date
An option which is exercisable at any time during its life.
An option that can be exercised at any time up to and including the expiry time on the expiration date. Also see European option.