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Definition of Polyacetylene
1. Noun. (organic chemistry) Any of a class of organic compounds containing a acetylene (-C?C-) repeat units, especially any that occur naturally in some composite plants. ¹
2. Noun. (organic compounds) A black polymer, derived from acetylene, containing alternating single and double bonds in a (-CH=CH-) repeat unit; it is an organic semiconductor. ¹
¹ Source: wiktionary.com