ZW

ZW

1. (metrology) Symbol for zettawatt, an SI unit of power equal to 10²¹ watts.

ZW

1. (international standards) ISO 3166-1 alpha-2 country code for Zimbabwe since 1980.

   Synonyms: ZWE (alpha-3 1980–present), RH (1974–1980, as Southern Rhodesia)

ZW

1. (genetics) Having a female configuration of chromosomes as per the ZW system.

   Synonym: XY

   Antonym: ZZ

• XX

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ZW

1. Initialism of zuidwest; SW