kombu

noun2

1. •
   Edible kelp (“a type of brown seaweed”) (from the class Phaeophyceae) used in East Asian cuisine.

   • It [monosodium glutamate] was discovered in 1908 by a Japanese scientist, Kikunae Ikeda, who was trying to pinpoint the source of the intense deliciousness of broth made from kombu seaweed. — 2007
2. •
   A kind of long horn instrument from Tamil Nadu and Kerala.