Definition of scutellum in English:



Botany Zoology
  • 1A small structure shaped like a shield.

    1. 1.1 A modified cotyledon in the embryo of a grass seed.
      • ‘Protein reserves in the cereal endosperm are sequentially degraded to small peptides and amino acids during germination and these are translocated across the scutellum to support growth of the embryo.’
      • ‘An aspartic proteinase was also found in the PB of scutellum cells in dry barley grains.’
      • ‘Peptide transport activity appears in the scutellum of barley seeds after 6-12 h imbibition, before any visible signs of germination, and increases rapidly to a maximum around 24 h imbibition.’
      • ‘Early studies on sucrose mobilization from the vacuole of germinating maize scutellum cells alluded to the likely possibility of SuSy being tonoplast associated.’
      • ‘The ENGase activity was almost equally distributed in the endosperm, the radicle and the scutellum.’
    2. 1.2 The third dorsal sclerite in each thoracic segment of an insect.
      • ‘The deposition of pollinaria on the scutellum of bees clearly enhances the chances of cross-pollination, since it is very difficult for these insects to groom and remove the pollinaria from this region.’
      • ‘Then, the arcuate viscidium firmly embraces and adheres on the bee scutellum and the pollinarium is removed.’
      • ‘In all these species, the broad arcuate viscidium firmly embraces the pollinator scutellum when the insect leaves the flower.’
      • ‘This reward-lacking orchid is pollinated either by workers or drones of Apis cerana japonica which fix pollinaria on the scutellum.’


Mid 18th century: modern Latin, diminutive of Latin scutum ‘shield’.