The plural form of the word 'soma', which means the body of an organism, especially as distinct from the mind.
Talking about somas is usually about the physical part of living things.
Examples:
The somas of the animals were big and strong.
She studied the somas of different creatures.
The somas of the trees were tall and straight.
The somas of the bugs were tiny and hard to see.
In the story, the somas of the monsters were scary and ugly.
The somas of the aliens were strange and different.