quadrivalent en · ADJ
Pronunciation
- /kwɒdrɪˈveɪlənt/
Etymology
Etymology tree Proto-Indo-European *kʷetwóresder. Proto-Indo-European *kʷetwr̥- Proto-Italic *kʷetru- Latin quadri-bor. English quadri- English -valent English quadrivalent From quadri- + -valent.
Meanings
- (not-comparable) Having a valence of four.
- (not-comparable, of a vaccine) Protecting against four different (usually influenza) viruses.
-
(not-comparable) Having all of its vertices of degree four.
In graph theory terms, a regular projection of a knot, or knot diagram is thus a quadrivalent planar graph with over/under-decorated vertices.
2020 January 3, Wikipedia contributors, “Knot (mathematics)”, in English Wikipedia, Wikimedia Foundation:
Deriveds
Relateds
quinquivalent · trivalent · bivalent