semidiameter

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noun semi·di·am·e·ter \ ˌse-mē-dī-ˈa-mə-tər , ˌse-ˌmī- , -mi- \
Updated on: 11 Sep 2017

Definition of semidiameter

:radius; specifically :the apparent radius of a generally spherical celestial body

First Known Use of semidiameter

14th century


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