a cobblestone is a form of:

Cobblestone



noun
1.
(A rounded stone used In paving) ដុំថ្ម (សម្រាប់ក្រាលថ្មនៅជំនាន់ដើម) / ថ្មមូល
ENGLISH MEANING
noun
1.
A large pebble; a rounded stone not too large to be handled; a small boulder; -- used for paving streets and for other purposes.