dronuilleach

Irish

Etymology

From dron (“right, straight”) +‎ uilleach (“angular”) (from uillinn (“angle”) +‎ -ach). Calque of Medieval Latin orthogōnālis.

Adjective

dronuilleach (genitive singular masculine dronuilligh, genitive singular feminine dronuillí, plural dronuilleacha, not comparable)

1. (geometry) orthogonal

Declension

Declension of dronuilleach

	Singular		Plural (m/f)
Positive	Masculine	Feminine	(strong noun)	(weak noun)
Nominative	dronuilleach	dhronuilleach	dronuilleacha; dhronuilleacha²
Vocative	dhronuilligh		dronuilleacha
Genitive		dronuillí	dronuilleacha	dronuilleach
Dative	dronuilleach; dhronuilleach¹	dhronuilleach; dhronuilligh (archaic)	dronuilleacha; dhronuilleacha²
Comparative	(not comparable)
Superlative	(not comparable)

¹ When the preceding noun is lenited and governed by the definite article.
² When the preceding noun ends in a slender consonant.

Derived terms

• triantán dronuilleach

Mutation

Irish mutation
Radical	Lenition	Eclipsis
dronuilleach	dhronuilleach	ndronuilleach
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

Further reading

• Ó Dónaill, Niall (1977) “dronuilleach”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN