ÿ

ÿ

1. (mathematics) The second-order differential of y, using Newtonian calculus notation; the y-component of the acceleration.

ÿ (upper case Ÿ)

1. Used in old or handwritten texts as a ligature for ij: for example, lÿst = lijst (list).

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ÿ (upper case Ÿ)

1. Found in a few French names as variant of ï, such as Pierre Louÿs and L'Haÿ-les-Roses, indicating that the ÿ forms a diphthong.

• IPA^(key): /ɰ/

ÿ (upper case Ÿ)

1. A letter of the Tlingit alphabet, written in the Latin script.

   Synonym: y̱

• Canada: (Latin-script letters) A a, Á á, À à,  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, Πî, 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), ․

• (North Wales) IPA^(key): /ˈɨː/, /ɨ̞/
• (South Wales) IPA^(key): /ˈiː/, /ɪ/

ÿ (upper case Ÿ)

1. The letter Y, marked for one of its syllabic pronunciations, (/ɨː, ɨ̞/ or /iː, ɪ/), distinct from adjacent vowels.