a vessel of a definite measure (probably four ounces) used to receive the blood in bloodletting.
the quantity contained in such a vessel.
A query on google.books for "pallet leech"  only returns cases where pallet refers to a sleeping platform. The first several pages of "pallet blood"  don't seem to support this either. Jeffqyzt 16:55, 1 August 2006 (UTC)
Some further searching on Google shows evidence of a term pallet count to do with blood samples, as well as a patent for a blood centrifuge listing a party named "Pallet" in the related patents section  (so perhaps it comes from a brand-name?) However, I still don't see any evidence to support this usage. Perhaps it restricted to specific medical contexts? Anyone with a medical background that can weigh in? Jeffqyzt 19:48, 20 August 2006 (UTC)
The "pallet count" above seems to be a misspelling of platelet count. Andrew massyn 19:42, 22 August 2006 (UTC)
I have been unable to find any independent verification for this sense, although I did find another definition in hereldary which I have entered. Rfvsense failed. Andrew massyn 19:42, 22 August 2006 (UTC)