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Reverse Search
Reverse Search allows you to search within the full text of dictionary entries for words, word parts, and phrases.
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Example: Searching for "apple orange" identifies all entries that contain the word "apple" or "apples" or "orange" or "oranges."
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Example: Searching for "apple orange" identifies all entries that contain the word "apple" and the word "orange."
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| across |
When one line is across another, it lies over a small part of it. When you make the letter X you put one line across the other. [1/5 definitions] |
| associative property |
in addition and multiplication, the characteristic that allows you to add or multiply a group of numbers in any order and get the same answer. For example, in multiplication, (5 x 2) x 7 is equal to (7 x 2) x 5. |
| CAT scan |
an image of an area of the body that is formed from a grouping of x-rays on a computer. CAT scans are used to make a diagnosis in medical treatment. CAT stands for computerized axial tomography. |
| cross out |
If you write a word and then you cross it out, it means you put a line or an X through the word. |
| distributive property |
in mathematics, a characteristic of numbers that allows you to multiply a group of numbers and get the same answer you would get if you multiplied each member of the group and then combined the answers. For example, 4 x (8 + 1 + 5) is equal to (4 x 8) + (4 x 1) + (4 x 5). |
| multiplication sign |
a mathematical sign (x) that says that the numbers before and after it are to be multiplied. |
| power |
the number of times another number is multiplied by itself. Three to the fourth power is equal to 3 x 3 x 3 x 3, or 81. [1/7 definitions] |
| Roman numeral |
a letter used as a number in the ancient Roman number system. The letter I equals 1, V equals 5, X equals 10, L equals 50, C equals 100, D equals 500, and M equals 1,000. In this system, a letter followed by one of equal or lesser value means the two are added; seven is VII, or 5+1+1. A letter followed by one of greater value means that the first is subtracted from the second; four hundred is CD, or 500-100. |
| ten |
the word for the Arabic numeral 10 and the Roman numeral X. [1/3 definitions] |
| tick-tack-toe |
a game for two players who take turns marking either an X or an O on a grid of nine squares. The winner is the first player who fills in three squares in a row with the same mark. |
| X-ray |
a beam of high-energy radiation that is able to pass through many kinds of solid material. [3 definitions] |
| zap |
to strike or hit with laser beams, x-rays, or microwaves. [1/2 definitions] |
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