hyrna

See also: hýrna and hyrne

Icelandic

A 3-simplex, also known as a ferflötungur, fjórflötungur, þrístrend strýta or þrístrendur píramíti (“a tetrahedron”).

Etymology

From Old Norse hyrna, from Proto-Germanic *hurnijǭ. Related to horn (“an angle, a corner”).

Pronunciation

• IPA^(key): /ˈhɪrtna/
• Rhymes: -ɪrtna

Noun

hyrna f (genitive singular hyrnu, nominative plural hyrnur)

1. a carton in the shape of a tetrahedron or a triangular pyramid
2. (geometry, topology) a simplex

Declension

Declension of hyrna (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	hyrna	hyrnan	hyrnur	hyrnurnar
accusative	hyrnu	hyrnuna	hyrnur	hyrnurnar
dative	hyrnu	hyrnunni	hyrnum	hyrnunum
genitive	hyrnu	hyrnunnar	hyrna	hyrnanna

Derived terms

derived terms from hyrna (“a carton”)

• mjólkurhyrna
• þríhyrna

derived terms from hyrna (“a simplex”)

• hyrnuaðferð (“the simplex method”)
• hyrnubákn (“simplicial complex”)
• hyrnufruma (“simplicial cell”)
• hyrnukeðja (“simplicial chain”)
• hyrnunálgun (“simplicial approximation”)
• hyrnurit (“simplex algorithm”)
• hyrnusvipfræði (“simplicial homology”)
• hyrnuvörpun (“simplicial mapping”)
• hyrnuþyrping (“simplicial complex”)

See also

• ferna
• mjólkurferna
• mjólkurpoki
• þríhyrningur

Further reading

• [1]

Norwegian Nynorsk

Etymology 1

From Middle Norwegian hyrni n, from Old Norse hyrna f, from Proto-Germanic *hurnijǭ f.

Alternative forms

• hjørne, hyrna

Noun

hyrna n (definite singular hyrna, indefinite and definite plural hyrno)

1. corner ((pre-1938) alternative form of hyrne n)

hyrna

1. definite plural of hyrne n

Etymology 2

Noun

hyrna f (definite singular hyrna, indefinite plural hyrner or hyrnor, definite plural hyrnene or hyrnone)

1. horned animal ((pre-2012) alternative form of hyrne f)

hyrna

1. definite singular of hyrne

References

• “hyrna” in The Nynorsk Dictionary.

Old Norse

Etymology

From Proto-Germanic *hurnijǭ, feminine diminutive of *hurną whence Old Norse horn. Ultimately from Proto-Indo-European *ḱerh₂-.

Noun

hyrna f

1. point of an axe-head
2. a corner

Declension

  Declension of hyrna (weak ōn-stem)

feminine	singular		plural
	indefinite	definite	indefinite	definite
nominative	hyrna	hyrnan	hyrnur	hyrnurnar
accusative	hyrnu	hyrnuna	hyrnur	hyrnurnar
dative	hyrnu	hyrnunni	hyrnum	hyrnunum
genitive	hyrnu	hyrnunnar	hyrna	hyrnanna

Related terms

• horn
• hyrning

Descendants

• Icelandic: hyrna f
• Middle Norwegian: hyrni n
  • Norwegian Nynorsk: hyrne
• Old Swedish: hyrna
  • Swedish: hörna c or f
• Danish: hjørne n
  • Norwegian Bokmål: hjørne
    • → Norwegian Nynorsk: hjørne

References

• “hyrna”, in Geir T. Zoëga (1910) A Concise Dictionary of Old Icelandic, Oxford: Clarendon Press