scu·tel·lum 
(sky-tĕləm)
(sky-tĕləm)n. pl. scu·tel·la (-tĕlə)
1. Zoology A shield-shaped sclerite on the mesothorax of certain insects, posterior to the scutum.
2. Botany Any of several shield-shaped structures, such as the cotyledon of a grass.
[New Latin scūtellum, from Latin, diminutive of scūtum, shield; see SCUTUM.]
scu·tellar (-tĕlər) adj.