noun
omega (Greek letter)
Refers to the last letter of the Greek alphabet, often used symbolically for the end or ultimate.
ギリシャ文字の最後はΩです。
The last letter of the Greek alphabet is omega.
noun
Metaphorical use derived from omega as the last letter; often appears in phrases like アルファでありオメガである (the alpha and the omega). Usually written in kana.
彼はアルファでありオメガである。
He is the alpha and the omega.
noun
ohm (unit of electrical resistance)
Only when written Ω
Physics term; restricted to the capital form Ω. Cross-referenced with オーム.
See also: オーム
この抵抗器は10Ωです。
This resistor is 10 ohms.
noun
angular velocity
Only when written ω
Physics term; restricted to the lowercase form ω. Cross-referenced with 角速度.
See also: 角速度
角速度は通常ωで表される。
Angular velocity is usually represented by ω.
From Greek Ω/ω (omega). The metaphorical 'end' sense comes from omega being the last letter of the Greek alphabet. The physics senses are derived from the symbol's use in scientific notation.