déhéidreach
Irish
Etymology
From dé- (“di-”) + -héidreach (“-hedral”).
Adjective
déhéidreach (genitive singular masculine déhéidrigh, genitive singular feminine déhéidrí, plural déhéidreacha, not comparable)
- (mathematics, aeronautics) dihedral
Declension
Declension of déhéidreach
| Singular | Plural (m/f) | |||
|---|---|---|---|---|
| Positive | Masculine | Feminine | (strong noun) | (weak noun) |
| Nominative | déhéidreach | dhéhéidreach | déhéidreacha; dhéhéidreacha² | |
| Vocative | dhéhéidrigh | déhéidreacha | ||
| Genitive | déhéidrí | déhéidreacha | déhéidreach | |
| Dative | déhéidreach; dhéhéidreach¹ | dhéhéidreach; dhéhéidrigh (archaic) | déhéidreacha; dhéhéidreacha² | |
| Comparative | níos déhéidrí | |||
| Superlative | is déhéidrí | |||
¹ When the preceding noun is lenited and governed by the definite article.
² When the preceding noun ends in a slender consonant.
Related terms
- déhéadrán m (“dihedron”)
Mutation
| Irish mutation | ||
|---|---|---|
| Radical | Lenition | Eclipsis |
| déhéidreach | dhéhéidreach | ndéhéidreach |
| Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. | ||
Further reading
- Ó Dónaill, Niall (1977), “déhéidreach”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN
- Entries containing “déhéidreach” in English-Irish Dictionary, An Gúm, 1959, by Tomás de Bhaldraithe.
- Entries containing “déhéidreach” in New English-Irish Dictionary by Foras na Gaeilge.