eta

Etymology 1

From Ancient Greek ἦτα (êta).

noun

1. The seventh letter of the Modern Greek alphabet, the eighth in Old Greek.
2. (physics) A kind of electrically neutral meson having zero spin and isospin.

Etymology 2

From Japanese 穢多 (“full of filth”) (literal translation, now considered derogatory in Japan).

noun

1. A social outcast in Japan who is subjected to menial work, making up a class or caste of such people.

Etymology 3

noun

1. Alternative form of ita (“kind of palm tree”)