a neutral meson with strangeness 0 that is its own antiparticle. Symbol: η.
[et-uh-meen] /ˈɛt əˌmin/ noun 1. a lightweight cotton or worsted fabric constructed in plain weave and loosely woven. /ˈɛtəˌmiːn/ noun 1. a cotton or worsted fabric of loose weave, used for clothing, curtains, etc
[et-ee-oin shurd-loo, -oh-in, ee-tee-] /ˈɛt iˌɔɪn ˈʃɜrd lu, -ˌoʊ ɪn, ˈi ti-/ noun 1. the letters produced by running the finger down the first two vertical rows of keys at the left of the keyboard of a Linotype machine: used as a temporary marking slug or to indicate that an earlier mistake in the line […]
[ey-tap; French ey-tap] /eɪˈtæp; French eɪˈtap/ noun, plural étapes [ey-taps; French ey-tap] /eɪˈtæps; French eɪˈtap/ (Show IPA). Military. 1. a place where troops camp after a day’s march. 2. a day’s march. 3. Archaic. supplies issued to troops during a march.
- Eta reduction