A Chip Off the __; Showing Family Characteristics

This page is the CodyCross answer for the clue below from Science Lab, Group 310, Puzzle 3 (Basic Oxides).

Question is: A Chip Off the __; Showing Family Characteristics

and the answer is: OLDBLOCK

Word Meaning:

OLD — Of an object, concept, relationship, etc., having existed for a relatively long period of time.

Definitions from Wiktionary.