トチノキ科かMeanings1nounHippocastanaceae; horse-chestnut familyBotanical family name; used in scientific and educational contexts.トチノキ科かの植しょく物ぶつには、マロニエやトチノキが含ふくまれる。Plants in the Hippocastanaceae family include horse chestnuts and Japanese horse chestnuts.