Prokaryotes have only one lipid bilayer- the cell membrane (also known as the plasma membrane). Many prokaryotes also have a cell wall, but the cell wall is composed of proteins or long chain carbohydrates, not lipids.
3. countable noun. A wedge is an object with one pointed edge and one thick edge, which you put under a door to keep it firmly in position. 4. countable noun. A wedge is a piece of metal with a pointed edge which is used for splitting a material such as stone or wood, by being hammered into a crack in the material.
Princeton's WordNet(3.00 / 4 votes)Rate this definition: 1  angle(noun) the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians. 2  slant, angle(noun) a biased way of looking at or presenting something.