parietic
Webster's Unabridged Dictionary:
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Pa·ri·et·ic
a.
(Chem.) Pertaining to, or designating, an acid found in the lichen Parmelia parietina, and called also chrysophanic acid.
(Chem.) Pertaining to, or designating, an acid found in the lichen Parmelia parietina, and called also chrysophanic acid.
