A muscle (or, rarely: other structure) that serves to close an opening or passage. Frequently attributive, especially in "occlusor muscle".
Today’s NYT Connections Answers May 10, #334 - Daily Updates & Hints
Today’s Wordle Answer May 10 #1056- NYT Wordle Hints & Updates
NYT Mini Crossword Answers Today - The Mini for May 10 Solved
NYT Strands Today - Hints, Spangram & Answers for May 10