| mastodon |
a very large extinct mammal. Several kinds of mastodons lived in Africa, Europe, Asia, and North America tens of thousands of years ago. The last kind of mastodon became extinct at the end of the last Ice Age. Mammoths and modern elephants may have developed from earlier mastodons. |
| mayfly |
a delicate insect with two pairs of wings. The mayfly larva may live for several years in a stream, lake, or river. Once it turns into an adult, it lives for only a few hours. [1/2 definitions] |
| medley |
a musical piece that uses the melodies from several different pieces of music. [1/2 definitions] |
| Missouri |
a river of the central United States. It flows from Montana southeast through several states to Missouri, where it joins the Mississippi River. [1/2 definitions] |
| morning glory |
a climbing vine with flowers that open in the morning and close by evening. Morning glory flowers are shaped like a trumpet and come in several colors. |
| mulberry |
any of several shade trees that have broad leaves and berrylike fruits. [1/3 definitions] |
| multiple-choice |
of a test or quiz, listing for each question several possible answers from which the correct one is to be chosen. |
| multivitamin |
a compound or combination of several vitamins in a single pill, tablet, or dose. |
| newspaper |
a publication made of several large sheets of folded paper printed with news, opinions, advertisements, and other information. Most newspapers come out either every day or once a week. |
| nurse |
a person who is paid to look after a child or several children. [1/4 definitions] |
| OPEC |
an association made up of several Arab nations that sell the oil they produce to other countries. "OPEC" is an abbreviation of "Organization of Petroleum Exporting Countries." |
| opossum |
a small mammal with gray fur, a pointed nose, and a long tail, which it uses to hang from tree branches. The common opossum is the only marsupial that lives in North America. Several other kinds of opossums live in Central and South America. The female opossum carries her young in a pouch in her belly. [1/2 definitions] |
| oriole |
a songbird that can be found in many parts of the world. Males have black and bright yellow or orange feathers. There are two main groups of birds that are considered orioles. There are several different kinds of orioles in each group. |
| permanent |
a hairdo of curls or waves that lasts for several months. [1/2 definitions] |
| peso |
the main unit of money in Mexico, Cuba, Argentina, and several other countries. |
| Ph.D. |
a degree that is earned following college after several years of additional study and the completion of a major research project. "Ph.D." is an abbreviation of Latin words which mean "Doctor of Philosophy." |
| pipe1 |
(sometimes plural) a musical instrument made up of one or several tubes that make notes when air is blown through them. [1/6 definitions] |
| pointer |
any of several breeds of dogs. Pointers are dogs that are trained to hunt birds by pointing with the nose and body toward the animal being hunted. [1/4 definitions] |
| prairie dog |
a small rodent with light brown fur. Prairie dogs make burrows and live in large colonies called "towns." Several kinds of prairie dogs live in Mexico and the United States. Prairie dogs are not related to true dogs, but have a cry that sounds like a dog's bark. |
| pueblo |
a house made of adobe or stone built by Native Americans in the southwest United States. Pueblos are shared by the community and are usually several stories high. [1/2 definitions] |
| raccoon |
a small mammal with brown and gray fur, a long tail with black rings, and a pointed face with black markings that look like a mask. Raccoons eat plants and small animals such as insects and frogs. In towns and cities, they eat garbage. Several kinds of raccoons live in North and South America and on Caribbean islands. |