The Y in the Product TCBY

This page is the CodyCross answer for the clue below from Physics, Group 1890, Puzzle 3 (Geiger Counter).

Question is: The Y in the Product TCBY

and the answer is: YOGURT

Word Meaning:

YOGURT — A milk-based product stiffened by a bacterium-aided curdling process, and sometimes mixed with fruit or other flavoring.

Definitions from Wiktionary.