caryopsis

< /ˌkær iˈɒp sɪˌdiz/. Botany.

1. a small, one-celled, one-seeded, dry indehiscent fruit with the pericarp adherent to the seed coat, the typical fruit of grasses and grains.

noun plural -ses (-siːz) or -sides (-sɪˌdiːz)

1. a dry seedlike fruit having the pericarp fused to the seed coat of the single seed: produced by the grasses

Plural caryopses (kăr′ē-ŏp′sēz′) caryopsides (kăr′ē-ŏp′sĭ-dēz′)

1. A small, dry, one-seeded fruit of a cereal grass, having the fruit and the seed walls united. Also called grain