What is the definition of Greek word kaleido?

The Greek word "καλeιδο" (kaleido) doesn't exist as a standalone word in classical or modern Greek. The word "kaleidoscope" is of Greek origin, but it's a compound word, not a single existing word. It's built from:

* καλός (kalos): meaning "beautiful"

* εἶδος (eidos): meaning "form" or "shape"

* -scope: This is from the Greek σκοπεῖν (skopein), meaning "to look at" or "to view," but it's a suffix added in English to create scientific instruments.

Therefore, there's no single Greek word "kaleido." The meaning is only found in the combination that created "kaleidoscope."