expanse expanses
An expanse of something, usually sea, sky, or land, is a very large amount of it.
...a vast expanse of grassland.
N-COUNT: usu N of n

1.crystalline
A crystalline substance is in the form of crystals or contains crystals.
Diamond is the crystalline form of the element carbon.
...hard, crystalline rock.
ADJ: usu ADJ n

2.crystalline
Crystalline means clear or bright. (LITERARY)
...a huge plain, crisscrossed by rivers and dotted with crystalline lakes.
ADJ: usu ADJ n