Tall annual cereal grass bearing kernels on large ears,widely cultivated in America in many varieties,the principal cereal in Mexico and Central and South America since pre-Columbian times.

• 一年生高粮食作物，颗粒长在巨大的穗上，在美洲种植广泛，种类繁多，在哥伦布发现新大陆前，已经是墨西哥和中、南美洲的主要谷物。