On the other hand, E-beam sterilization can be harmful to products containing batteries or electronic components. It can also degrade rubber and polypropylene, but these materials now come in grades that are E-beam compatible, Wilson notes.
A trajectory is the path of an object through space, or the path of life that a person chooses. The prefix tra- is short for trans-, which means across (think transport and transit) and the ject comes from jacere, which means throw and is also the root of the word jet.
Definition of direction for Students. 1  1 : the path along which something moves, lies, or points I'm coming from the opposite direction. 2  2 : an order or instruction to be followed Read the directions first. 3  3 : instructions on how to get somewhere.  4 : supervision, management He took over direction of the project.