Word of the day; "grumous".

This, and the related noun grume, are doctors’ (and in particular
pathologists’) jargon for a blood clot or any viscous fluid or mass of fluid.
but being aware of its existence in English may be helpful for those
non-doctors who are familiar with French le grumeau (lump, clot) or Italian
il grumo (clot (whether milk or blood)).

It’s an unremarkable borrowing from late Latin, OED describes [ad. late L.
grumus little heap, hillock;]. I can’t find any convincing further etymology
beyond that.

--
‘As I sat looking up at the Guinness ad, I could never figure out /
How your man stayed up on the surfboard after fourteen pints of stout’
(C. Moore)