eta
nounUK /ˈiːtə/
US /ˈeɪtə/
The seventh letter of the Greek alphabet.
In math class, we learned that eta is the seventh letter of the Greek alphabet.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A tiny unit of time equal to one billionth of a second, used in computing.
The program finished in just a few etas.
3. A measure of how well a machine or process uses energy compared to what it could use.
The new engine has a high eta, so it wastes very little fuel.
4. An estimated time of arrival.
The app showed our eta as 3:15 p.m.