concretions is a form of:

Modification



noun
1.
(A slight change in form, qualification or limitation of meaning) ការកែប្រែ, ការបន្ថយ, ការសម្រាល, កំណែប្រែ (ការកែប្រែ)
Example: The modification of the plans for the new hotel reduced expenses, We made a few modifications in the school New Year program.
Example: The design of the spacecraft is undergoing extensive modification.
2.
(បច្ចេកទេស) ការកែសម្រួល
ENGLISH MEANING
noun
1.
The act of modifying, or the state of being modified; a modified form or condition; state as modified; a change; as, the modification of an opinion, or of a machine; the various modifications of light.
1.
adjustment, alteration, alternation, change, substitution, transformation, variation, variety
1.
monotony, stability, uniformity