the.com/socket

a hole that holds whatever you plug into it, no questions asked

means A hollow fitting designed to receive and hold something — a plug, a bone, an eyeball, a light bulb — so the two parts lock together.

from From Anglo-Norman 'soket,' a diminutive of Old French 'soc,' meaning a ploughshare — the metal point of a plough. The likely image is of a small ploughshare-shaped spike or its hollow fitting; over time the word drifted from the blade to the socket that received it. The 'soc' itself is thought to be of Gaulish or Celtic origin, related to words for a pig's snout, since a ploughshare roots through earth the way a snout does.

eye anatomy
your eyeballs live in bony sockets called orbits
electric variety
230 outlet types exist worldwide, none agreeing
linux roots
network sockets let programs talk across machines
word origin
from old french for a plowshare's little point
joint design
your hip is a ball-and-socket built to swivel
for instance

unix domain socket — inter-process communication mechanism in unix systems since 1983, used by x11 and systemd

berkeley socket — bsd socket api created at uc berkeley in 1983, became the standard for network programming

websocket — full-duplex communication protocol standardized in rfc 6455 (2011), enables real-time web applications

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