| abacus |
a device used for counting or calculating. An abacus has beads or other counters that slide along rods or in grooves. |
| abdomen |
the rear part of the body of an insect. [1/2 definitions] |
| abolition |
the act of doing away with or putting an end to; the act of abolishing. [1/2 definitions] |
| aborigine |
one of the first people to live in an area. |
| abscess |
a sore that forms within the tissues of the body and is filled with pus. Abscesses can be caused by an infection. |
| absence |
an instance or period of time of being away. [1/3 definitions] |
| abuse |
to talk to or about in an insulting or unfair way. [1/6 definitions] |
| acacia |
a tree that grows in tropical areas of the world, especially in parts of Africa and Australia. The branches of an acacia spread out very wide and evenly across the top. Sometimes the top of the tree looks almost flat. |
| accessory |
an item added on to something else to make it prettier, more complete, or more useful. [1/2 definitions] |
| accident |
an event that happens by chance, especially a harmful one. [1/2 definitions] |
| accomplishment |
something that has been successfully done or completed; an achievement. [1/2 definitions] |
| accord |
an agreement between or among countries. [1/4 definitions] |
| accordion |
a musical instrument with a keyboard that is small enough to carry. An accordion is played by pressing the keys and squeezing the bellows to force air through metal reeds. |
| accumulation |
an amount that collects or piles up. [1/2 definitions] |
| ace |
a playing card that has only one mark. In card games, an ace has either the highest value of all the cards or the lowest. [1/5 definitions] |
| acid |
made of or containing an acid. [1/4 definitions] |
| acorn |
the fruit of an oak tree. |
| acreage |
the number of acres in an area of land. |
| across |
so as to pass over at an angle, as one line crossing over another. [1/5 definitions] |
| actively |
in a way that involves making an effort, taking action, or participating. |
| act up |
to happen again or return, as an illness or malfunction. [1/2 definitions] |