| Term | Definition |
| Noxious | injurious to physical or mental health |
| Nucleus | a part of the cell containing DNA and RNA and responsible for growth and reproduction |
| Nutrient | any substance that can be metabolized by an organism to give energy and build tissue |
| Opinion | the reason for a court's judgment (as opposed to the decision itself) |
| Organism | a living thing that has (or can develop) the ability to act or function independently |
| Parasite | an animal or plant that lives in or on a host (another animal or plant) |
| Period | an amount of time |
| Permeate | spread or diffuse through |
| Phenomenom | observable event |
| Photo | light |
| Photosynthesis | synthesis of compounds with the aid of radiant energy (especially in plants) |
| Poly | much, many |
| Potential | the difference in electrical charge between two points in a circuit expressed in volts |
| Precise | sharply exact or accurate or delimited |
| Precision | the quality of being reproducible in amount or performance |
| Prevailing | encountered generally especially at the present time |
| Primary | coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit |
| Process | a particular course of action intended to achieve a result |
| Pseudo | a person who makes deceitful pretenses |
| Radiation | (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance |
| Random | lacking any definite plan or order or purpose |
| Reaction | doing something in opposition to another way of doing it that you don't like |
| Reflection | the image of something as reflected by a mirror (or other reflective material) |
| Regulate | check the emission of (sound) |
| Sediment | matter deposited by some natural process |
| Sequence | the action of following in order |
| Severe | very bad in degree or extent |
| Solubility | the quality of being soluble |
| Solute | the dissolved substance in a solution |
| Solution | a method for solving a problem |