Question

What does the term “inversion symmetric” mean?

Answer 1

there are many types of symmetries are there
like that inversion symmetry means
a point of group which contains an inversion centre as one of its symmetry elements is centrosymmetry .such point groups are said to be inversion symmetry

Answer 2

Hello mate here is your answer.

From a geometrical point of view, inversion symmetry is equal to point symmetry, i.e. invariance under a point reflection.

Hope it helps you.