semidiameter

[ sem-ee-dahy-am-i-ter, sem-ahy- ]
/ ˌsɛm i daɪˈæm ɪ tər, ˌsɛm aɪ- /

noun

half of a diameter; radius.

Origin of semidiameter

First recorded in 1545–55; semi- + diameter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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