Circuitry is all the electrical paths inside a device. Delicate circuitry, the circuitry failed, printed circuitry.
It is the collective word, so you speak of the circuitry rather than the circuitries. Printed circuitry replaced hand wiring in the 1950s and made mass electronics possible. In writing about the brain it is a metaphor and a rough one.
1nouncircuitryAll the electrical paths inside a device.
“Water got into the phone and damaged its circuitry.”
circuitry is a system.
Circuit plus -ry, from Latin circuitus, a going round — circum plus ire, to go.
Latin
circuitus — a going round
Old French
circuit
Middle English
circuit
English
circuit
English, today
circuitry
Built from
From circuit + ry. circuit comes from Middle English circuit, from Old French circuit, from Latin circuitus (“a going round”), from circuire (“go round”), from circum (“around”) + ire.
Etymology from Wiktionary, CC BY-SA