NODULE


Meaning of NODULE in English

In geology, a rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs.

Nodules usually are elongated and have a knobby irregular surface; they are generally oriented parallel to the bedding. Chert and flint , clay ironstone, and phosphorites commonly occur as nodules. Manganese-rich nodules are found on the ocean floor.

Britannica English dictionary.      Английский словарь Британика.