noun
horse chestnut; conker tree
Refers to the tree Aesculus hippocastanum, known for its conkers. Botanical term.
公園に大きなセイヨウトチノキが植えられている。
A large horse chestnut tree is planted in the park.
セイヨウトチノキの実はマロニエとも呼ばれる。
The fruit of the horse chestnut is also called marronnier.
Refers to the Japanese horse chestnut (Aesculus turbinata), a related native species.
Compound of 西洋 (せいよう, 'Western') + 栃の木 (とちのき, 'horse chestnut tree').