Where does “microthermal” come from?

microthermal (English) comes from English thermal, from French thermal, from New Latin thermalis, from Ancient Greek Θέρμη, from Proto-Indo-European gʷʰer-, from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr.

microthermal (English): Of or relating to the continental climates of...

Definitions

Of or relating to the continental climates of...

Ancestry of “microthermal”, step by step

microthermal traces back through two separate lines of ancestry.

via English thermal

Step	Language	Word	Meaning
1	English	thermal	A column of rising air in the lower atmosphere...
2	French	thermal	thermal
3	New Latin	thermalis	—
4	Ancient Greek	Θέρμη	Therma, Macedonia, Greece
5	Proto-Indo-European	gʷʰer-	warm, hot
6	Proto-Indo-European	gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr	—

via English micro

Step	Language	Word	Meaning
1	English	micro	Small, relatively small; short form of...
2	Ancient Greek	μικρός	little, small
3	Proto-Indo-European	mēy-	soft, tender, dear

Every word from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr →