The most common and most likely answer to this crossword clue is the 3 letter word ETA which also is the latest solution we found used in New York Times in 2020.
Efficiency symbol, in physics crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| ETA | 100 % | 3 | 
Words with a meaning similar to the clue: Efficiency symbol, in physics
These words may or may not be a possible solution to this crosswords clue.- etas
 - q factor
 - force
 - energy
 - fines
 - yield
 - dynamic
 - power
 - differential
 - form
 - burn
 - harmonic
 
Crossword Answer definitions
ETA noun- The seventh letter of the Modern Greek alphabet, the eighth in Old Greek.
 - A kind of electrically neutral meson having zero spin and isospin.
 
- A social outcast in Japan who is subjected to menial work, making up a class or caste of such people.
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution