Pronunciation: /ˌpɛrɪˈsʌɪklɪk, -ˈsɪk-/
adjective
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1 Chemistry relating to or denoting a reaction that involves a concerted rearrangement of bonding in which all the bonds broken or formed in the reaction lie on a closed ring, whether or not a cyclic molecule is involved.
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2 Botany relating to a pericycle.