| adoption |
the act of becoming the legal parent of a child who is not one's biological offspring. |
| burst |
to break, open up, or explode suddenly. |
| century |
a unit of time equal to one hundred years. |
| glide |
to move smoothly and without effort. |
| headline |
the title to a newspaper article that tells what the article is about. The headline for the most important news is in the largest type on the front page of the paper. |
| hemisphere |
either of two halves of the earth. A hemisphere is formed by dividing the earth into the Northern and Southern Hemispheres at the equator, or into the Eastern and Western Hemispheres at a meridian. |
| index |
an alphabetical list of subjects, names, or other information in a book, with page numbers given for each item. |
| mention |
to speak of briefly or in passing. |
| organ |
a part of plants or animals that performs a particular task. The heart, the lungs, the skin, and the eyes are all organs of animals. |
| perimeter |
the boundary or border of a figure or area. |
| roast |
to cook or bake with dry heat in an oven or over an open fire. |
| rotate |
to cause to turn around on an axis. |
| seasonal |
having to do with the seasons or a particular season of the year. |
| sharpen |
to make thinner or finer, as a cutting edge or point. |
| tumor |
a mass of extra tissue that grows in or on the body. Some tumors are harmful. |