Here are some examples of how "-oid" is used:
* Asteroid: A celestial body resembling a star, but not emitting its own light.
* Android: A robot resembling a human.
* Crystalloid: A substance resembling a crystal in its structure.
* Ellipsoid: A figure resembling an ellipse in three dimensions.
* Bulbous: Having a rounded, swollen shape like a bulb.
* Feline: Having the characteristics of a cat.
Key points:
* "-oid" implies a resemblance, not an exact match.
* It is often used to describe physical forms or characteristics.
* It can also be used to describe more abstract qualities, such as behavior or personality.
Let me know if you'd like more examples!