a light malleable ductile silvery-white metallic element that resists corrosion; the third most abundant element in the earth's crust (8.1 per cent), occurring only as a compound, principally in bauxite. It is used, esp in the form of its alloys, in aircraft parts, kitchen utensils, etc. Symbol: Al; atomic no: 13; atomic wt: 26.9815; valency: 3; relative density: 2.699; melting pt: 660.45°C; boiling pt: 2520°C
WordReference Random House Learner's Dictionary of American English © 2025
a•lu•mi•num /əˈlumənəm/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2025- Chemistrya silver-white metallic element, light in weight and not easily corroded or tarnished, used in alloys and for lightweight products.
a•lu•mi•num
(ə lo̅o̅′mə nəm),USA pronunciation n.
adj.
al•u•min•ic
(al′yə min′ik),USA pronunciation adj.
WordReference Random House Learner's Dictionary of American English © 2025- Chemistrya silver-white metallic element, light in weight, ductile, malleable, and not readily corroded or tarnished, occurring combined in nature in igneous rock, shale, clay, and most soil: used in alloys and for lightweight utensils, castings, airplane parts, etc. Abbr.: alum.; Symbol: Al;
at. wt.: 26.98;
at. no.: 13;
sp. gr.: 2.70 at 20°C.
adj.
- Chemistryof, pertaining to, or containing aluminum:an aluminum frying pan.Also,[esp. Brit.,] aluminium.
- Neo-Latin, alteration, by Humphry Davy, of alumium, which was first proposed; aluminium formed after other metals in -ium. See alumina, -ium
- 1812
al•u•min•i•um /ˌælyəˈmɪniəm/USA pronunciation
n. [uncountable] Chiefly Brit.
WordReference Random House Unabridged Dictionary of American English © 2025- British Terms aluminum.
al•u•min•i•um
(al′yə min′ē əm),USA pronunciation n., adj. [Chiefly Brit.]
- British Termsaluminum.
Collins Concise English Dictionary © HarperCollins Publishers::
'aluminum' also found in these entries (note: many are not synonyms or translations):
agora
- al
- albronze
- albumen plate
- algraphy
- allanite
- allophane
- almandine
- alnico
- alum
- alumina
- alumina trihydrate
- aluminate
- aluminiferous
- aluminite
- aluminium
- aluminize
- alumino-
- aluminosilicate
- aluminothermy
- aluminum acetate
- aluminum ammonium sulfate
- aluminum borate
- aluminum borohydride
- aluminum brass
- aluminum bronze
- aluminum carbide
- aluminum chloride
- aluminum fluosilicate
- aluminum glycinate
- aluminum hydroxide
- aluminum monostearate
- aluminum nitrate
- aluminum oxide
- aluminum silicate
- aluminum soap
- aluminum sulfate
- alunite
- alunogen
- amblygonite
- ammonal
- ammonia alum
- ammonium alum
- amphibole
- andalusite
- anodize
- antiperspirant
- armored personnel carrier
- attapulgite