膠こう原げん質しつこうげんしつじ字FuriganaMeanings1nouncollagenMedical and biochemical term for the structural protein found in connective tissues. Often replaced by the loanword コラーゲン in everyday contexts.See also: コラーゲン膠こう原げん質しつは皮ひ膚ふや骨ほねに多おおく