This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of or relating to an organic compound, especially an oil or fatty acid, containing only one double or triple bond per molecule. Foods containing monounsaturated fatty acids may decrease the amount of LDL cholesterol in the blood and include olive, peanut, canola, and avocado oils.

adj. having a single double or triple bond

adj. (of long-chain carbon compounds especially fats) saturated except for one multiple bond

"Specifically, avocado is rich in an unsaturated fat called monounsaturated fat, also found in nuts and seeds and olive and canola oils."

unsaturated