An alternative or archaic form meaning 'relating to analgesia' or 'having pain-relieving properties'; essentially synonymous with analgesic.
From analgesia + -etic (relating to). This is an older spelling variant reflecting historical preferences in English medical terminology.
In old pharmaceutical texts, you'd see 'analgetic' properties listed for various medicines. It's an alternate spelling that lost out to 'analgesic,' showing how standardization happens gradually in technical language.
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