Guano

n.

1.

A substance found in great abundance on some coasts or islands frequented by sea fowls, and composed chiefly of their excrement. It is rich in phosphates and ammonia, and is used as a powerful fertilizer.

Noun

1.

guano - the excrement of sea birds; used as fertilizer

body waste, excrement, excreta, excretion, excretory product, organic, organic fertiliser, organic fertilizer