isosceles

== English == === Etymology === Borrowed from Latin īsoscelēs, from Ancient Greek ἰσοσκελής (isoskelḗs, “equal-legged”), from ἴσος (ísos, “equal”) +‎ σκέλος (skélos, “leg”) +‎ -ής (-ḗs, adjective suffix). See also iso-. === Pronunciation === IPA(key): /aɪˈsɒsəliːz/ === Adjective === isosceles (not comparable) (geometry) Having (at least) two sides of equal length, used especially of a triangle or trapezoid. ==== Usage notes ==== A trapezoid with two equal sides and two unequal sides is normally described as unequilateral, even though it can be regarded as a special case of isosceles trapezoid. A triangle with three equal sides is normally described as equilateral, even though it can be regarded as a special case of isosceles triangle. ==== Derived terms ==== ==== Translations ==== === Further reading === Isosceles trapezoid on Wikipedia.Wikipedia Isosceles triangle on Wikipedia.Wikipedia Isosceles (disambiguation) on Wikipedia.Wikipedia === Anagrams === solecises == Latin == === Etymology === Borrowed from Ancient Greek ῐ̓σοσκελής (ĭsoskelḗs), from ῐ̓́σος (ĭ́sos, “equal”) +‎ σκέλος (skélos, “leg”) +‎ -ής (-ḗs, adjective suffix). === Pronunciation === (isoscelēs): (Classical Latin) IPA(key): [ɪˈsɔs.kɛ.ɫeːs] (modern Italianate Ecclesiastical) IPA(key): [iˈs̬ɔʃ.ʃe.les] (isosceles): (Classical Latin) IPA(key): [ɪˈsɔs.kɛ.ɫɛs] (modern Italianate Ecclesiastical) IPA(key): [iˈs̬ɔʃ.ʃe.les] === Adjective === isoscelēs (genitive isoscelis); third-declension one-termination adjective (geometry) isosceles (having equal legs) ==== Declension ==== Third-declension one-termination adjective (Greek-type). 1It is unknown whether adjectives of this type would use i-stem or consonant-stem endings in Classical Latin: the relevant forms are not attested. Depending on the word, either ending or both may be attested in New Latin. Notes: The Greek masculine and feminine nominative singular is ῐ̓σοσκελής (ĭsoskelḗs), while the masculine and feminine vocative singular and the neuter nominative, accusative and vocative singular are ῐ̓σοσκελές (ĭsoskelés). Maybe Latin preserved the short length of the epsilon (ε), or maybe it did not so that the declension became similar to Latin third declension adjectives of one ending (like felix). This word is often used together with triangulum n and rarer with triangulus m. The vowel length is attested with starting īso- as well, but the Greek etymology points to ĭso- with a short vowel. === References === “īsoscĕles”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press “īsoscĕlēs”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette, page 860/3.