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.
Poppers is a common slang term for a range of chemical psychoactive drugs called alkyl nitrites, and in particular, the inhalant drug amyl nitrite. Quick Facts About Poppers. The most common type of poppers inhalant is amyl nitrite. It is often confused with amyl nitrate, which is, in fact, a different chemical with a similar name, often misspelt as amil nitrate. Poppers are also known as liquid gold, butyl nitrite, heart medicine, and room deodorizer.