| tyrant |
a ruler who governs absolutely and with arbitrary or unjust cruelty and oppression. [3 definitions] |
| Tyrian purple |
a natural purple dye formerly obtained from certain snails and shellfish and now made synthetically. [2 definitions] |
| tyro |
one who is beginning to learn a business, trade, sport, or the like; novice; neophyte. |
| tyrosine |
an amino acid found in proteins that is a precursor of certain hormones and neurotransmitters. |
| tzar |
a variant of czar. |
| tzarevich |
variant of czarevitch. |
| tzarina |
variant of czarina. |
| tzetze fly |
variant of tsetse fly. |
| tzigane |
(sometimes cap.) pertaining to, consisting of, or characteristic of gypsies. [2 definitions] |
| U |
symbol of the chemical element uranium. |
| U. |
abbreviation of "University," an educational institution devoted to learning and research and authorized to award degrees on both the graduate and undergraduate levels (used in a proper name). |
| u |
the twenty-first letter of the English alphabet. [4 definitions] |
| U-2 |
a U.S. aircraft formerly used for surveillance from very high altitudes. |
| uakari monkey |
any of several species of medium-sized, tree-dwelling monkeys with long fur and bald heads that inhabit the Amazon Basin. |
| UAR |
abbreviation of "United Arab Republic," the official name of Egypt in 1958-61. [2 definitions] |
| UAW |
abbreviation of "United Automobile, Aerospace, and Agricultural Implement Workers" (formerly, United Automobile Workers). |
| ubiquitous |
being or appearing to be in all places at the same time; omnipresent. |
| ubiquity |
the condition of being, or seeming to be, everywhere at the same time; omnipresence. |
| U-boat |
a German submarine. |
| udder |
a large mammary organ with two or more glands, each with its own nipple, as in a cow or goat. |
| udon |
thick Japanese noodles made from wheat flour, salt, and water. |