Is “Eta” a Scrabble word?
Yes
ETA
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Eta
/ˈiːtə/
noun
1.The seventh letter of the Modern Greek alphabet, the eighth in Old Greek.
2.A kind of electrically neutral meson having zero spin and isospin.