Dislocation defect is also known as-

1. Frenkel defect.

2. Schottky defect.

3. Non-stoichiometric defect.

4. Simple interstitial defect.

HINT: Atoms move from their lattice sites to an interstitial site.
Explanation:
Frenkel defect is also known as dislocation defect because in Frenkel defect atoms present in the crystal lattice are dislocated to the interstitial site.
Defects in Solids- Introduction, Types and Examples