[ əˌrakɪ'dɒnɪk ]
■ noun Biochemistry a fatty acid present in animal fats which is an essential constituent of the human diet.
Origin
early 20th cent.: from mod. L arachis , arachid 'peanut', from Gk arak(h)os , -kis + -one + -ic .
ARACHIDONIC ACID
Meaning of ARACHIDONIC ACID in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004