hesperidium

noun, plural hes·per·id·i·a [hes-puh–rid-ee-uh] /ˌhɛs pəˈrɪd i ə/. Botany.

1. the fruit of a citrus plant, as an orange.

noun

1. botany the fruit of citrus plants, in which the flesh consists of fluid-filled hairs and is protected by a tough rind