Areca catechu
Betel nut refers to the seed of "Areca catechu", or betel palm, which, like "Cocos nucifera" (coconut palm), belongs to family Arecaceae. It is an evergreen tree whose trunk can grow as tall as twenty meters. The word "binlan" originated from Indonesian. Betel nut was initially used as a herbal plant, although in modern times it is mostly taken for its stimulating properties.