Let's Compare Mucosa and Serosa. 1  MUCOSA VS.  Mucosa. The mucous membranes (or mucosae or mucosas; singular mucosa) are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion. mucosa \mucosa\ n.
Definition of dropper for English Language Learners. : a glass or plastic tube that is used to measure out liquids by drops.
A flipper is an acrylic denture that may be used to replace just one tooth, but also may replace several teeth. It can be used as an immediate replacement for an extracted tooth, as an interim replacement while an implant is integrating to the bone and sometimes as a long term replacement if finances are a problem.