system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Are thermal detonators just what Star Wars calls grenades or are they a special thing different from normal grenades?
gpt
in Legends, they used to be micro thermo nuclear explosions. (yeah..)

In the current cannon, they certainly fill the same role as grenades, but they clearly have an electronic component and explode perfectly evenly, which means they don't operate like a gunpowder grenade does. There are multiple kinds of throw able explosives in star wars so people call those specific ones "thermal detonators". 

You could make a normal grenade in the star wars universe, and presumably it would just be called "a grenade"