A misspelling or variant of 'desiccate'; to dry out or remove moisture from something.
This appears to be a non-standard or historical variant of 'desiccate.' The correct spelling is 'desiccate' from Latin siccus (dry).
Misspellings reveal how English spelling crystalized unevenly—'desicate' suggests an older pronunciation or regional variant, but standardization through print eventually locked us into the double-c version.
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