noun
monounsaturated fatty acid
Technical term in chemistry and nutrition. Refers to a fatty acid with one double bond in its carbon chain.
オリーブオイルには一価不飽和脂肪酸が多く含まれている。
Olive oil contains a lot of monounsaturated fatty acids.
Compound of 一価 (いっか, 'monovalent') + 不飽和 (ふほうわ, 'unsaturated') + 脂肪酸 (しぼうさん, 'fatty acid'). A calque from English 'monounsaturated fatty acid'.