Definition of protoplanet in English:
A large body of matter in orbit around the sun or a star and thought to be developing into a planet: this analysis supported the view that the moon originated from a glancing collision between the earth and another protoplanet 4,500 million years ago
More example sentences
- Learning more about the protoplanet won't be fast or easy.
- The protoplanet candidate orbits about 70 times further from its star than Earth does from the Sun.
- It isn't clear how the latest suspected protoplanet is being formed.
Definition of protoplanet in:
- US English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the US
Most popular in the UK
Most popular in Australia
Most popular in Malaysia
Most popular in India
Most popular in Pakistan