one-to-many

Short definition from Wiktionary

Adjective

1. 1
   Having the property that the same argument may yield multiple values, but different arguments never yield the same value.
2. 2
   Having the property that an element of one set may be assigned by the relationship to several elements in the other set, but that a given element in the second set can have only one member of the first set assigned to it.
3. 3
   From a single source to multiple recipients.