Lumbar Puncture
This page is the CodyCross answer for the clue below from Fauna and Flora, Group 174, Puzzle 4 (Protocooperation).
Question is: Lumbar Puncture
and the answer is: SPINALTAP
Word Meaning:
SPINAL TAP — (medicine, colloquial) Lumbar puncture (LP).
Definitions from Wiktionary.