semidiameter

English

Etymology

From Middle English semidiametre, semydiametre, from Medieval Latin sēmidiameter, equivalent to semi- +‎ diameter.

Noun

semidiameter (plural semidiameters)

  1. (astronomy) The apparent radius of a star etc, when viewed from Earth.
  2. (archaic) A radius: half of a diameter.

Derived terms
  • semidiameter correction
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.