α

α

1. (electrodynamics) The fine structure constant.
2. (classical mechanics) Represents angular acceleration.

   See Wikipedia article on angular acceleration for usage.

3. (chemistry) Used in chemical nomenclature.

   α-lactam has a three-membered ring structure.

4. (astronomy) Used to identify some bright star, usually the brightest star, of a constellation, for instance α-Centauri.
5. (topology) Alexandroff compactification

• α-naphthol

• alpha (for names of this symbol in other language)

Derived from its Ancient Greek majuscule counterpart Α (A, “Alpha”), in turn from the Phoenician letter 𐤀‎ (“aleph”).

α • (a) (lower case, upper case Α)

1. Lower-case άλφα (álfa, “alpha”), the first letter of the modern Greek alphabet. Represents the open front unrounded vowel: /a/.

• Ancient Greek, however, did not distinguish between upper case and lower case. See Α (A) for details.

• α' (a', “one, 1”)
• ,α (,a, “one thousand, 1,000”)

• Appendix:Greek alphabet

From Ancient Greek ἆ (â).

α! • (a!)

1. Expresses wonder, surprise or joy; ah, ooh, oh, wow:

   Α, τι πανέμορφη θέα! ― A, ti panémorfi théa! ― Wow, what a gorgeous view!

   Α, δεν σε περίμενα! Ποτέ έφτασες; ― A, den se perímena! Poté éftases? ― Oh, I wasn't expecting you! When did you get here?

2. Expresses desire or wish; oh:

   Α και να ερχόταν να με δει! ― A kai na erchótan na me dei! ― Oh, if only he would come to see me!

3. Expresses anger or threat; oh:

   Α που να σε πάρει ο διάολος! ― A pou na se párei o diáolos! ― Oh, the devil take you/Oh, to hell with you!

   Α έτσι μου είσαι; Θα δεις εσύ τώρα! ― A étsi mou eísai? Tha deis esý tóra! ― Oh, so that's how it is? Wait till you see!

4. Expresses impatience; oh, ah:

   Α δεν μπορώ να περιμένω άλλο! ― A den boró na periméno állo! ― Ah, I can't wait any longer!

5. Expresses confirmation of a fact; oh, ah:

   Α ναι βεβαίως ήταν αυτός! ― A nai vevaíos ítan aftós! ― Ah, yes, of course it was him!

6. Expresses desire against; oh, ah:

   Α όχι αυτός πάλι! ― A óchi aftós páli! ― Oh, not him again!

7. Answer word, can be either positive or negative; eh, meh:

   Θα 'ρθεις απόψε στο πάρτι; Α, μπα! ― Tha 'rtheis apópse sto párti? A, ba! ― Will you be coming to the party tonight? Ah, nah!

   Ωραίο δεν ήταν το έργο; Α, καλό ήταν! ― Oraío den ítan to érgo? A, kaló ítan! ― Wasn't the film nice? Eh, it was good!

8. Answer word of indifference; meh:

   Πως πάει το σχόλιο τελευταία; Α, έτσι κι έτσι! ― Pos páei to schólio teleftaía? A, étsi ki étsi! ― How's school going lately? Meh, so-so!

From άι < άε from Ancient Greek ἄγε sg (áge, “go!”, pres.imp.) (with deletion of ‑γ-) of verb ἄγω (“I lead”)[1][2]. Also see etymologies of άντε, άιντε, άμε.

• άι (ái) (uncontracted)

• and see: άντε (ánte) for interchangeable interjections for dismissal

α • (a)

1. (colloquial) Contraction of άντε (ánte).

   Α να χαθείς! ― A na chatheís! ― Oh, get lost!

   Α στο καλό πια, σε βαρέθηκα! ― A sto kaló pia, se varéthika! ― Oh go away will you, I'm sick of you!

• α να χαθείς (a na chatheís, “get lost!”)
• α στο διάολο (a sto diáolo, “go to the devil (to hell)!”)
• α στο καλό (a sto kaló, “go to what is good (with multiple senses)”)
• and see Greek dismissals

α (transliteration needed) f sg

1. feminine nominative singular of ο

From Ancient Greek ἡ (hē) ᾱ̔ (hā), from Proto-Indo-European *séh₂.

• IPA^(key): /a/

α (transliteration needed) (lower case, upper case Α)

The first letter of the Tsakonian alphabet.

• (Greek script letters) Α α, Α̈ α̈, Ά ά, Β β, Γ γ, Δ δ, Ε ε, Έ έ, Ζ ζ, Ζ̌ ζ̌, Ζ̑ ζ̑, Η η, Ή ή, Θ θ, Ι ι, Ί ί, Ϊ ϊ, ΐ, Κ κ, Κ̀ κ̒, Λ λ, Λ̣ λ̣, Λ̑ λ̑, Μ μ, Ν ν, Ν̇ ν̇, Ν̑ ν̑, Ξ ξ, Ο ο, Ό ό, Π π, Π̀ π̒, Ρ ρ, Σ σ ς, Σ̌ σ̌ ς̌, Σ̑ σ̑ ς̑, Τ τ, Τ̀ τ̒, Τζ τζ, Τσ τσ τς, Υ υ, Ύ ύ, Ϋ ϋ, ΰ, Φ φ, Χ χ, Ψ ψ, Ω ω, Ώ ώ