hyrna
See also: hýrna and hyrne
Icelandic
![](Images/wiktionary/Tetrahedron.png.webp)
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)
- a carton in the shape of a tetrahedron or a triangular pyramid
- (geometry, topology) a simplex
Declension
declension of hyrna
f-w1 | 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
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)
- corner ((pre-1938) alternative form of hyrne n)
hyrna
- plural definite of hyrne n
Noun
hyrna f (definite singular hyrna, indefinite plural hyrner or hyrnor, definite plural hyrnene or hyrnone)
- horned animal ((pre-2012) alternative form of hyrne f)
hyrna
- singular definite 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
- point of an axe-head
- 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
- Norwegian Bokmål: hjørne
References
- “hyrna”, in Geir T. Zoëga (1910) A Concise Dictionary of Old Icelandic, Oxford: Clarendon Press