Noun
hijiki (uncountable)
Sargassum fusiforme, a brown seaweed used in Japanese cuisine. [from 20th c.]
My favourite is when it's cooked with some hijiki, carrots, and spring onions in a bit of soy sauce and mirin. Source: Internet
They may not be totally mainstream yet, but there's good reason to incorporate marine gems like nori, hijiki, wakame, arame, and kombu into your regular diet. Source: Internet