胚はい盤ばん

noun

germinal disk; blastodisc

Biology term for the disc-shaped region on the yolk of a large-yolked egg where the embryo develops.

• 鳥ちょう類るいの卵たまごでは、胚はい盤ばんが胚はい発はっ生せいの起き点てんとなる。

  In bird eggs, the germinal disk is the starting point of embryonic development.

noun

scutellum

Botany term for the shield-shaped cotyledon of grass seeds, specialized for nutrient absorption from the endosperm.

• イネ科か植しょく物ぶつの種しゅ子しでは、胚はい盤ばんが胚はい乳にゅうから養よう分ぶんを吸きゅう収しゅうする。

  In grass seeds, the scutellum absorbs nutrients from the endosperm.