guano

n [U] dung from sea-birds, poultry, etc, used as fertilizer 海鸟、 家禽等的粪（用作肥料）.

gruel, grueling, gruelling (US grueling), gruesome, gruesomely, gruesomeness, gruff, gruffly, gruffness, grumble, grumbler, grummet, grumpily, grumpiness, grumpy, grunt, gruyere, gryphon, GT, Guam, guarantee, guarantee against, guarantor, guaranty, guard, guard against, guard's van, guard-rail, guarded, guardhouse, guardian, guardian angel, guardianship, guardroom, guardsman, Guatemala, guava, gubernatorial, gudgeon, guelder rose,