socket (n.) Look up socket at Dictionary.com
c.1300, "spearhead" (originally one shaped like a plowshare), from Anglo-French soket "spearhead" (mid-13c.), diminutive of Old French soc "plowshare," from Vulgar Latin *soccus, probably from a Gaulish source, cf. Welsh swch "plowshare," Middle Irish soc "plowshare," properly "hog's snout," cognate with Latin sus "swine;" see sow (n.) "female pig." Meaning "hollow part or piece for receiving and holding something" first recorded mid-15c.; anatomical sense is from c.1600; domestic electrical sense first recorded 1885. Socket wrench is attested from 1905.