η
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Character variations
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Translingual
[edit]Symbol
[edit]η
- (mathematics) The metric tensor in quantum field theory.
- (chemistry, physics) The coefficient of viscosity.
- (engineering) Efficiency in engineering.
- (physics) Sommerfeld parameter.
- (machine learning) Learning rate.
- (UPA) Alternative form of ŋ.
See also
[edit]
Ancient Greek
[edit]Etymology
[edit]Derived from its majuscule counterpart Η, from the Phoenician letter 𐤇, heth.
Letter
[edit]η • (ē) (lowercase, uppercase Η)
- Lower-case eta, the seventh letter of the ancient Greek alphabet. Its name was ἦτα and it represented a long open-mid front unrounded vowel: /ɛː/. It is often transliterated as either e or i. It is preceded by ζ and followed by θ.
Derived terms
[edit]See also
[edit]- ἡ (hē, feminine article)
- ἥ (hḗ, feminine of pronoun ὅς)
- ᾖ (ēî, inflectional form of verb εἰμί)
- (Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
- (non-Classical letters) Ϝ (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (S) ϻ (s), Ϟ ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
- (punctuation) · ⸳ . ;
- (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨
Greek
[edit]Pronunciation
[edit]- IPA(key): /i/ pronounced unstressed, together with its following word; compare to the stressed ή (í)
- Homophone: οι (oi)
Etymology 1
[edit]From the vocalic usage of the Ancient Greek letter.
Letter
[edit]η • (i) (lowercase, uppercase Η)
- Lower-case eta, the seventh letter of the modern Greek alphabet. Its name is ήτα and it represents a close front unrounded vowel: /i/. It is often transliterated as either e or i. It is preceded by ζ and followed by θ.
See also
[edit]- (Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
- (non-Classical letters) Ϝ (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (S) ϻ (s), Ϟ ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
- (punctuation) · ⸳ . ;
- (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨
Etymology 2
[edit]From Attic Greek ἡ (hē), from Proto-Hellenic *hā́, from Proto-Indo-European *séh₂.
Article
[edit]η • (i)
- (definite) feminine nominative singular of ο (o, “the”)
Declension
[edit]Categories:
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