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A________
Definitions
a structurally different form of an element
Word origin
Back-formation from allotropy, as allo- + -trope, from Ancient Greek ἄλλος (állos, “other”), and τρόπος (trópos, “way, manner”).
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
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