scutellum
/skjuːˈteləm/noun
(pl. scutella /-lə/)
1- Botany & Zoology a small shield-like structure, in particular【植, 动】盾盖, 盾片, 尤指：
1.1
- a modified cotyledon in the embryo of a grass seed草籽胚中的变形的子叶。
1.2
- the third dorsal sclerite in each thoracic segment of an insect昆虫胸节的第三个背甲片。
词源
mid 18th cent.: modern Latin， diminutive of Latin scutum 'shield'.