Parashas Terumah · Passuk 25:18
Chagigah 13b
English: What is the meaning of keruv? Rabbi Abahu said: It is like a ravya, a child, for in Babylonia they call a child “ravya.”
What Is Learned: The name “keruv” is explained as referring to the appearance of a child, based on the Babylonian term ravya.