C2 noun #87,007 most common

eta

UK /ˈiːtə/ | US /ˈiːtə/

The seventh letter of the Modern Greek alphabet, the eighth in Old Greek.

eta in 30 Seconds

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

Meanings

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