Question

what is unit cell define ?​

Answer 1

the smallest group of atoms which has the overall symmetry of a crystal, and from which the entire lattice can be built up by repetition in three dimensions.

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Answer 2

Explanation:

Cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. ... A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature.