The Collaborative International Dictionary
Alkahestic
Alkahest \Al"ka*hest\, n. [LL. alchahest, F. alcahest, a word that has an Arabic appearance, but was probably arbitrarily formed by Paracelsus.] The fabled ``universal solvent'' of the alchemists; a menstruum capable of dissolving all bodies. -- Al`ka*hes"tic, a.
WordNet
alkahestic
adj. of or pertaining to the alkahest that alchemists assumed to exist