Neural

google

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mid 19th century: from Greek neuron in the sense ‘nerve’ + -al.

wiktionary

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From Ancient Greek νεῦρον(neûron, “a sinew, nerve”) +‎ -al.

etymonline

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neural (adj.)

"pertaining to a nerve or nerves, pertaining to the nervous system generally," 1830, from Greek neuron "nerve" (see neuro-) + adjectival suffix -al (1). Related: Neurally. Compare nervous.