Wiktionary
n. An anatomical dissection carried out by an experienced anatomist as a demonstration for others.
Wikipedia
A prosection is the dissection of a cadaver (human or animal) or part of a cadaver by an experienced anatomist in order to demonstrate for students anatomic structure. In a dissection, students learn by doing; in a prosection, students learn by either observing a dissection being performed by an experienced anatomist or examining a specimen that has already been dissected by an experienced anatomist (etymology: Latin pro- "before" + sectio "a cutting")
A prosection may also refer to the dissected cadaver or cadaver part which is then reassembled and provided to students for review.
Usage examples of "prosection".
She kept a diamond sharpening stone in her prosection pack and a round edging steel.
He had no intention of signing Fleet personnel lives away if he could help it, but a yielding of objection on prosection of some station officials classed as state enemies… that might have to be.