# Ei
## Translingual
### Noun

Ei
* The exponential integral, a special function, defined as:
    $\operatorname {Ei} (x)=\int _{-\infty }^{x}{\frac {e^{t}}{t}}dt$

## Angami
### Letter

Ei
* The tenth letter of the Angami alphabet, written in the Latin script.

#### See also

* (Latin-script letters) Ü ü, Üi üi, A a, Ai ai, I i, Ie ie, U u, Uo uo, E e, Ei ei, O o, Ou ou, K k, Kh kh, G g, Ng ng, C c, Ch ch, J j, Jh jh, Ny ny, T t, Th th, D d, N n, Ts ts, Tsh tsh, Dz dz, P p, Ph ph, B b, M m, Pf pf, Bv bv, Y y, Yh yh, R r, Rh rh, L l, Lh lh, F f, V v, W w, Wh wh, S s, Sh sh, Z z, Zh zh, H h

## German
### Etymology

Inherited from Middle High German ei and Old High German ei, from Proto-West Germanic *aij, from Proto-Germanic *ajją, from Proto-Indo-European *h₂ōwyóm.
Cognate with Yiddish איי (ey), Dutch ei, West Frisian aai, English ey and egg, Danish æg.

### Pronunciation

* IPA: /aɪ̯/
* Audio:(file)
* Rhymes: -aɪ̯

### Noun

Ei n (strong, genitive Eies or Eis, plural Eier, diminutive Eichen n or Eierchen n or Eilein n)
* egg (all biological senses)
    Willst du dein Ei hart oder weich?Do you want your egg hard-boiled or soft-boiled?
    Das befruchtete Ei nistet sich in der Gebärmutter ein.The fertilised egg nidates in the uterus.
* something egg-shaped
* (informal, usually in the plural) testicle; ball (also figuratively)
    Mal sehen, ob ihr Eier habt!Let’s see if you guys have balls!
* (colloquial, in the plural) bucks (money)
    Kost’ dreißig Eier, der Spaß.This thing costs thirty bucks.
* (colloquial, usually vocative, mildly derogatory) clown; foolish bloke
    Da steht „ziehen“, du Ei.[The sign] says “pull”, you clown.

#### Declension

$^1$Now rare, see notes.

#### Derived terms

* 'n Appel und 'n Ei
* Eieruhr
* eiförmig
* Eigelb
* Eiklar
* Eiweiß
* Landei
* Osterei, Oster-Ei
* Rührei
* Spiegelei
* Straußenei, Straussenei
* Tee-Ei, Teeei
* Weichei

### Further reading

* “Ei” in Digitales Wörterbuch der deutschen Sprache
* “Ei” in Uni Leipzig: Wortschatz-Lexikon
* “Ei” in Duden online
* Ei on the German Wikipedia.Wikipedia $^{de}$
* Friedrich Kluge (1883) “Ei”, in John Francis Davis, transl., Etymological Dictionary of the German Language, published 1891

## Plautdietsch
### Etymology

From Middle Low German ei, from Old Saxon ei, from Proto-Germanic *ajją, from Proto-Indo-European *h₂ōwyóm. Compare Dutch ei, obsolete English ey, West Frisian aai, Danish æg, German Ei.

### Noun

Ei n (plural Eia)
* egg

#### Derived terms

* Eiajälet
* Eiaküak
* Eirunt
* Eiaschol
* Eiastock
* Eiawittet

## Tlingit
### Pronunciation

* IPA: /eː/

### Letter

Ei (lower case ei)
* (US) A letter of the Tlingit alphabet, written in the Latin script.
    Synonym: È

#### See also

* Canada:
* (Latin-script letters) A a, Á á, À à, Â â, Ch ch, Chʼ chʼ, D d, Dł dł, Dz dz, E e, É é, È è, Ê ê, G g, Gw gw, Gh gh, Ghw ghw, H h, I i, Í í, Ì ì, Î î, J j, K k, Kw kw, Kʼ kʼ, Kʼw kʼw, Kh kh, Khw khw, Khʼ khʼ, Khʼw khʼw (L l), Ł ł, Łʼ łʼ (M m), N n (O o), S s, Sʼ sʼ, Sh sh, T t, Tʼ tʼ, Tl tl, Tlʼ tlʼ, Ts ts, Tsʼ tsʼ, U u, Ú ú, Ù ù, Û û, W w, X x, Xw xw, Xʼ xʼ, Xʼw xʼw, Xh xh, Xhw xhw, Xhʼ xhʼ, Xhʼw xhʼw, Y y (Ÿ ÿ), ․
* US:
* (Latin-script letters) A a, Á á, Aa aa, Áa áa, Ch ch, Chʼ chʼ, D d, Dl dl, Dz dz, E e, É é, Ee ee, Ée ée, Ei ei, Éi éi, G g, Gw gw, G̱ g̱, G̱w g̱w, H h, I i, Í í, J j, K k, Kw kw, Kʼ kʼ, Kʼw kʼw, Ḵ ḵ, Ḵw ḵw, Ḵʼ ḵʼ, Ḵʼw ḵʼw, L l, Lʼ lʼ (Ḻ ḻ, M m), N n (O o), Oo oo, Óo óo, S s, Sʼ sʼ, Sh sh, T t, Tʼ tʼ, Tl tl, Tlʼ tlʼ, Ts ts, Tsʼ tsʼ, U u, Ú ú, W w, X x, Xw xw, Xʼ xʼ, Xʼw xʼw, X̱ x̱, X̱w x̱w, X̱ʼ x̱ʼ, X̱ʼw x̱ʼw, Y y (Ÿ ÿ, Y̱ y̱), ․