linkage

nouns

an associative relation
is derived from
is a type of (narrower)
a relation between things or events (as in the case of one causing the other or sharing features with it)
"there was a connection between eating that pickle and having that nightmare"
(genetics) traits that tend to be inherited together as a consequence of an association between their genes; all of the genes of a given chromosome are linked (where one goes they all go)
a mechanical system of rods or springs or pivots that transmits power or motion
is derived from
is a type of (narrower)
a system of elements that interact on mechanical principles
the act of linking things together
is derived from
is a type of (narrower)
the act of fastening things together