| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024ti•ta•ni•um /taɪˈteɪniəm/USA pronunciation n. [uncountable]- Chemistrya dark gray or silvery, shiny, very hard, light, metallic element that resists corrosion, used to toughen steel.
WordReference Random House Unabridged Dictionary of American English © 2024ti•ta•ni•um (tī tā′nē əm),USA pronunciation n. [Chem.]- Chemistrya dark-gray or silvery, lustrous, very hard, light, corrosion-resistant, metallic element, occurring combined in various minerals: used in metallurgy to remove oxygen and nitrogen from steel and to toughen it. Symbol: Ti;
at. wt.: 47.90;
at. no.: 22;
sp. gr.: 4.5 at 20°C.
- Neo-Latin (1795); see Titan, -ium
Collins Concise English Dictionary © HarperCollins Publishers:: titanium /taɪˈteɪnɪəm/ n - a strong malleable white metallic element, which is very corrosion-resistant and occurs in rutile and ilmenite. It is used in the manufacture of strong lightweight alloys, esp aircraft parts. Symbol: Ti; atomic no: 22; atomic wt: 47.88; valency: 2, 3, or 4; relative density: 4.54; melting pt: 1670±10°C; boiling pt: 3289°C
Etymology: 18th Century: New Latin; see Titan, -ium |