| Z, z (noun) | 1 the twenty-sixth letter of the alphabet. 2 (algebra) the third unknown quantity. 3 (math) the third coordinate. |
| zany (adjective) | crazy (a zany comedy). |
| zap (verb) | 1 (in computer games) to destroy or kill. 2 to change television channel using a remote control. |
| zeal (noun) | keenness, eagerness, enthusiasm (show a great deal of zeal for keeping fit). |
| zealot (noun) | a person who is so keen on a cause or idea that he or she can talk of nothing else. |
| zealous (adjective) | very keen, eager (zealous supporters of the cause). adv zealously |
| zebra (noun) | a striped horse-like animal from Africa. |
| Zelophobia | fear of jealousy or of strong emotion (see list of phobias) |
| Zemmiphobia | fear of the mole rat (see list of phobias) |
| zenith (noun) | 1 the point of the heavens directly overhead. 2 the highest point (the zenith of his career). |
| Zenography | study of the planet Jupiter (see list of branches of science) |
| zephyr (noun) | (lit) a gentle breeze. |
| zero (noun) | 1 the figure 0. 2 the 0-mark on a measuring scale. |
| zero hour (noun) | the time fixed for the beginning of something, such as a military attack. |
| zest (noun) | keen enjoyment, enthusiasm (the old lady’s zest for life). adj zestful. |
| Zeusophobia | fear of God (see list of phobias) |
| zigzag (adjective) | turning sharply to the left, following a straight line, then turning sharply to the right, and so on. n a zigzag line or course. vb (zigzagged , zigzagging ) to follow a zigzag course. |
| zinc (noun) | a bluish-white metal |
| Zionism (noun) | the movement to found and develop Israel. adj and n Zionist |
| zip (verb) | (zipped , zipping ) 1 (informal) to whiz (I’m just zipping to the drugstore). 2 to fasten with a zipper (the girl asked her mother to zip up her dress). |
| zip code (noun) | a number identifying a postal area of the United States. |
| zipper (noun) | a sliding fastener that causes two strips of metal teeth to engage in or disengage from each other as it moves. |
| zither (noun) | a flat stringed musical instrument played with the fingers. |
| zodiac (noun) | the band of the heavens in which the sun, moon, and planets seem to move, containing the twelve groups of stars known as the signs of the zodiac. |
| zone (noun) | 1 any region with distinctive characteristics of its own. 2 any of the five regions of the surface of the earth that are divided according to prevailing climate and latitude. 3 a section of an area established for a specific purpose, e.g. a section of a city restricted to a particular type of building, enterprise, etc (a residential zone). |
| zoo (noun) | a park in which animals are kept in cages, enclosures, ponds, etc, for show. |
| Zooarchaeology | study of animal remains of archaeological sites (see list of branches of science) |
| Zoochemistry | study of chemistry of animals (see list of branches of science) |
| Zoogeography | study of geographic distribution of animals (see list of branches of science) |
| Zoogeology | study of fossil animal remains (see list of branches of science) |
| zoological (adjective) | having to do with the study of animals. zoological gardens a zoo. |
| zoologist (noun) | a person who studies animals. |
| Zoology | study of animals (see list of branches of science) |
| zoology (noun) | the study of animals. |
| zoom (verb) | 1 to climb rapidly at a steep angle. 2 (informal) to increase rapidly. 3 (informal) to move very quickly. |
| zoom lens (noun) | a camera lens that is adjusted for focusing on close or distant objects. |
| Zoonomy | study of animal physiology (see list of branches of science) |
| Zoonosology | study of animal diseases (see list of branches of science) |
| Zoopathology | study of animal diseases (see list of branches of science) |
| Zoophobia | fear of animals (see list of phobias) |
| Zoophysics | study of physics of animal bodies (see list of branches of science) |
| Zoophysiology | study of physiology of animals (see list of branches of science) |
| Zoophytology | study of plant-like animals (see list of branches of science) |
| Zoosemiotics | study of animal communication (see list of branches of science) |
| Zootaxy | study of classification of animals (see list of branches of science) |
| Zootechnics | study of breeding animals (see list of branches of science) |
| zucchini (noun) | a cylindrical summer squash with dark green skin; a courgette. |
| Zulu (noun) | 1 a member of an African tribe. 2 its language. Also adj. |
| Zygology | study of joining and fastening (see list of branches of science) |
| Zymology | study of fermentation (see list of branches of science) |
| Zymurgy | study of brewing and distilling (see list of branches of science) |
| Zythology | study of beer (see list of branches of science) |
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