ちょくさ 直鎖 LinksSentence search for 直鎖Sentence search for ちょくさKanji details for 直 and 鎖Edit in JMdict Noun or verb acting prenominally, Noun which may take the genitive case particle 'no'1. straight-chain; open-chain; acyclic; linearChemistry Discussions Log in to talk about this word.