firð

See also: firth and Firth

Icelandic

Etymology

From Proto-Germanic *feridō.

Pronunciation

• IPA^(key): /fɪrð/
• Rhymes: -ɪrð

Noun

firð f (genitive singular firðar, no plural)

1. a metric, a distance

Declension

Declension of firð (sg-only feminine)

	singular
	indefinite	definite
nominative	firð	firðin
accusative	firð	firðina
dative	firð	firðinni
genitive	firðar	firðarinnar

Derived terms

• áttrækin einsfirðun (orientation-preserving isometry)
• áttskiptin einsfirðun (orientation-reversing isometry)
• einsfirða (isometry)
• einsfirðanagrúpa (isometry group)
• einsfirðun (isometry, isometric)
• evklíðsk firð (euclidean metric)
• faldfirð (product metric)
• firðamargfeldi (product metric)
• firðanlegur (metrizable)
• firðanleiki (metrizability)
• firðargrannmynstur (metric topology, strong topology, natural topology, norm topology)
• firðgrannmynstur (metric topology, strong topology, natural topology, norm topology)
• firð- (metric)
• firðrúm (metric space)
• firðrækinn (distance-preserving, isometric)
• firðrækin vörpun (isometry, isometric)
• firðunarsetning (metrization theorem)
• firðun (metrization)
• firðþinur (fundamental tensor)
• firðþinur (metric tensor, fundamental tensor)
• fullkomið firðrúm (complete metric space)
• færðrækinn (isometric, distance-preserving)
• gervifirð (pseudo-metric, semimetric)
• hálffirð (quasi-metric)
• hálfgildingsfirð (pseudo-metric, semimetric)
• Hermite-firð (hermitian metric)
• hermísk firð (hermitian metric)
• hluteinsfirðun (partial isometry)
• innri firð (intrinsic metric)
• jafnfirðarferill (equidistance curve, hypercycle)
• jafnfirðarferill (hypercycle, equidistance curve)
• ofurfirðarójafna (ultrametric triangle inequality)
• ofurfirðrúm (ultrametric space)
• ofurfirð (ultrametric)
• Riemann-firð (Riemannian metric)
• strengfirð (chordal metric)
• venjuleg firð (usual metric)
• þéttteljanlegt firðrúm (separable metric space)