multigraph

English

A multigraph with a loop (blue) and three edges with the same endpoints (all red). Not all authors allow multigraphs to have loops.

Etymology

From multi- +‎ graph. Compare multiset.

Noun

multigraph (plural multigraphs)

1. (graph theory) A set V (whose elements are called vertices or nodes), taken together with a multiset E, each of whose elements (called an edge or line) is a cardinality-two multisubset of V.

   Synonym: pseudograph

2. (graph theory, less commonly) A set V (as before), taken together with a multiset E, each of whose elements is a cardinality-two subset of V.
3. (historical, printing) A combined rotary typesetting and printing machine for office use. The type is transferred semi-automatically by means of keys from a type-supply drum to a printing drum. The printing may be done by means of an inked ribbon to print "typewritten" letters, or directly from inked type or a stereotype plate, as in a printing press.
4. (linguistics) A specific sequence of letters treated as a (phonemic) unit.

   Hyponyms: digraph, trigraph, tetragraph

Hypernyms

• multihypergraph

Hyponyms

• multidigraph

Related terms

• multisubgraph
• submultigraph

Verb

multigraph (third-person singular simple present multigraphs, present participle multigraphing, simple past and past participle multigraphed)

1. (historical, transitive) To print using a multigraph machine.

Further reading

• multigraph on Wikipedia.Wikipedia
• multigraph (orthography) on Wikipedia.Wikipedia