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.
1 stake. noun \ËstÄk\. Tweet. : a pointed stick or post that is pushed into the ground especially to mark a place or to support something. the stake: a post that a person was tied to and burned on in the past as a form of punishment. stakes: something (such as money) that you could win or lose in a game, contest, etc. stake. noun \ËstÄk\. Tweet. : a pointed stick or post that is pushed into the ground especially to mark a place or to support something. the stake: a post that a person was tied to and burned on in the past as a form of punishment. stakes: something (such as money) that you could win or lose in a game, contest, etc.