How to say "alpha" in Japanese

• ΑアルファCommon
  nounThe Greek letter alpha itself, the first letter of the Greek alphabet. Use it when the letter is meant as such — for example when naming it or reading it aloud.
  トップのリーダーは犬いぬの行動こうどう学がくでは「アルファ」と呼よばれ、以下いか「ベータ」「ガンマ」と続つづきます。↗

  In dog ethology the leader is called 'alpha'; after that it continues with 'beta' and 'gamma'.
• 首星しゅせい
  nounAn astronomical term for the brightest star in a constellation — the 'Alpha' of that constellation. Less common, it fits only this sense and is not a general way to say 'alpha'.

Α（アルファ） is the word for the Greek letter alpha itself; 首星, a less common astronomical term, means the brightest star in a constellation — the 'Alpha' of that constellation.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• Αアルファalpha
• 首星しゅせいbrightest star in a constellation