noun
cat grass; catgrass
Grass grown for cats to eat, often oat grass (Avena sativa). Commonly sold in pet stores.
猫のためにねこくさを買ってきた。
I bought some cat grass for my cat.
ねこくさを食べると猫の毛玉が取れやすくなる。
Eating cat grass helps cats pass hairballs.
Cat toy (literally 'cat teaser'), not a plant for eating.
Foxtail grass; a wild grass that resembles cat grass but is not typically sold as pet food.
Compound of 猫 (neko, 'cat') and 草 (kusa, 'grass'). The exact origin is uncertain, but the word likely arose from the practice of growing grass for domestic cats.