noun
oil seed
Technical term for seeds cultivated primarily for their oil content, such as rapeseed, sunflower seeds, or sesame seeds.
菜種は代表的な脂肪種子の一つです。
Rapeseed is one of the typical oil seeds.
油糧種子 is a near-synonym also meaning 'oil seed', but 脂肪種子 emphasizes the fat/oil content while 油糧種子 stresses the use as a raw material for oil production.
Compound of 脂肪 (しぼう, 'fat, oil') and 種子 (しゅし, 'seed').