Warm

"Warm" is an item distribution flag.

If an item has a DIST line with the entry "warm", then it can be found at three types of planets: forest, grassland and ocean worlds.

Such items show up quite commonly at orange, yellow, and white stars, as those three star types have a lot of warm planets. They can also show up at other stars, with increasing lesser odds: green, binary, blwhite, blue, redgt, reddf.