Where does “antisplenetic” come from?

antisplenetic (English) comes from English splenetic, from Late Latin spleneticus, from Latin splēn, from Ancient Greek σπλήν, from Ancient Greek σπληχ-.

antisplenetic (English): Good as a remedy against disease of the spleen;...

Definitions

Good as a remedy against disease of the spleen;...

Ancestry of “antisplenetic”, step by step

antisplenetic traces back through two separate lines of ancestry.

via English splenetic

Step	Language	Word	Meaning
1	English	splenetic	Bad-tempered, irritable, peevish, spiteful,...
2	Late Latin	spleneticus	affected with spleen; splenetic
3	Latin	splēn	spleen, milt
4	Ancient Greek	σπλήν	milt, spleen
5	Ancient Greek	σπληχ-	—

via English anti

Step	Language	Word	Meaning
1	English	anti	Opposed to something; That has a torsion angle...
2	English	anti-	Against, hostile to; Contrasting with the norm;...
3	Ancient Greek	ἀντι-	anti-, against; like, reminiscent of
4	Ancient Greek	ᾰ̓ντῐ́	opposite

Every word from Ancient Greek σπληχ- →Every word from Ancient Greek σπλήν →Every word from Latin splēn →