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.
11 Tasteful & Badass Under Eye Tattoos. The infamous Tear Drop is a popular prison tattoo symbol that can mean many things. For some prisons, an outline symbolizes attempted murder, while a full black teardrop means that the prisoner committed murder. A life has been taken, which explains why the design is such.