isosceles
See also: isósceles
English
Etymology
Borrowed from Latin īsoscelēs, from Ancient Greek ἰσοσκελής (isoskelḗs, “equal-legged”), from ἴσος (ísos, “equal”) + σκέλος (skélos, “leg”) + -ής (-ḗs, adjective suffix).
Pronunciation
Adjective
isosceles (not comparable)
- (geometry) Having (at least) two sides of equal length, used especially of a triangle or trapezoid.
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- 1914, Henry Parker Manning, Geometry of Four Dimensions, page 204:
- A right double pyramid is isosceles when the extremities of the vertex-edge are at the same distance from the plane of the base.
- 1945, Harold E. Wolfe, Introduction to Non-Euclidean Geometry, page 31:
- To prepare for the application of his method, Saccheri made use of a figure with which we are already acquainted. This is the isosceles quadrilateral with the two base angles right angles.
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Usage notes
- A triangle with three equal sides is normally described as equilateral, even though it can be regarded as a special case of isosceles triangle.
Translations
having two sides of equal length, used especially of an isosceles triangle
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Further reading
- Isosceles triangle on Wikipedia.Wikipedia
- Isosceles (disambiguation) on Wikipedia.Wikipedia
Anagrams
Latin
Etymology
Borrowed from Ancient Greek ἰσοσκελής (isoskelḗs), from ἴσος (ísos, “equal”) + σκέλος (skélos, “leg”) + -ής (-ḗs, adjective suffix).
Pronunciation
- (īsoscelēs): (Classical Latin) IPA(key): /iːˈsos.ke.leːs/, [iːˈs̠ɔs̠kɛɫ̪eːs̠]
- (modern Italianate Ecclesiastical) IPA(key): /iˈsoʃ.ʃe.les/, [iˈs̬ɔʃːeles]
- (īsosceles): (Classical Latin) IPA(key): /iːˈsos.ke.les/, [iːˈs̠ɔs̠kɛɫ̪ɛs̠]
- (modern Italianate Ecclesiastical) IPA(key): /iˈsoʃ.ʃe.les/, [iˈs̬ɔʃːeles]
Adjective
īsoscelēs (genitive īsoscelis); third-declension one-termination adjective
Declension
Third-declension one-termination adjective (Greek-type).
Number | Singular | Plural | |||
---|---|---|---|---|---|
Case / Gender | Masc./Fem. | Neuter | Masc./Fem. | Neuter | |
Nominative | īsoscelēs | īsosceles1 īsoscelēs |
īsoscelēs | īsoscelia | |
Genitive | īsoscelis | īsoscelum īsoscelium | |||
Dative | īsoscelī | īsoscelibus | |||
Accusative | īsoscelem | īsosceles1 īsoscelēs |
īsoscelēs | īsoscelia | |
Ablative | īsoscele īsoscelī |
īsoscelibus | |||
Vocative | īsosceles1 īsoscelēs |
īsoscelēs | īsoscelia |
1It is unknown if Classical Latin preserved (or would have preserved) the shortness of the original Greek short ending. Notes:
- The Greek masculine and feminine nominative singular is ἰσοσκελής (isoskelḗs), while the masculine and feminine vocative singular and the neuter nominative, accusative and vocative singular are ἰσοσκελές (isoskelés). 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.
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.
Categories:
- English terms borrowed from Latin
- English terms derived from Latin
- English terms derived from Ancient Greek
- English 4-syllable words
- English terms with IPA pronunciation
- English lemmas
- English adjectives
- English uncomparable adjectives
- en:Geometry
- English terms with quotations
- Latin terms borrowed from Ancient Greek
- Latin terms derived from Ancient Greek
- Latin 4-syllable words
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- Latin lemmas
- Latin adjectives
- Latin third declension adjectives
- Latin third declension adjectives of one termination
- la:Geometry