omicron
意味
- オミクロン(ギリシヤ語アルファベット第15字Ο,ο;英語のO,oの短音に相当)
語源
英語の原文（Wiktionary）
From Latin omicron, from Koine Greek ὂ μῑκρόν (ò mīkrón, “little o”), named in contrast with omega (“big o”). The uncommon form omicra is similarly borrowed from Latin and Greek. The use for designating stars in a constellation—typically in order of apparent brightness—began with Johann Bayer's 1603 Uranometria.