I. ˈspāsə(r) noun
( -s )
: one that spaces: as
a. : a device or piece for holding two members at a given distance from each other
trucks which have spacers between dual tires — Motor Transportation in the West
wood spacers holding the sides of a concrete form the proper distance apart
when more than one layer of bars lies at the bottom of a beam or girder the layers are separated by spacers — Theodore Crane
b. : a person or machine that spaces ties at proper intervals in railroad track
c. : a current-reversing device used especially in cable telegraphy to increase speed of transmission
d. : space bar
II. noun
: a region of chromosomal DNA between genes that is not transcribed into messenger RNA and is of uncertain function