Wikipedia definition
1. Calybium and cupuleThe calybium and the cupule make up the accessory fruit of flowering plants in the family Fagaceae. These two parts derive from different flower components. The cupule holds and protects the seed during its growth and maturation. In some genera, it only partly encloses the single nut, while in others, it fully encloses the two or more nuts, and splits open at maturity into four valves to release the nuts.
Read “Calybium and cupule” on English Wikipedia
Read “殻斗果” on Japanese Wikipedia
Read “Calybium and cupule” on DBpedia


to talk about this word.