contiguity

noun

Etymology: From French contiguïté (whence -ity), from Late Latin contiguitās, from Latin contiguus (“bordering upon”), from contingō (“to touch or border upon”).

1. A state in which two or more physical objects are physically touching one another or in which sections of a plane border on one another.

   “In the mechanical conception of ‘cause’ it is…demanded that there should be spatial and temporal contiguity between the movements involved.”