Ac |
symbol of the chemical element actinium. |
actinium |
a radioactive chemical element of the rare-earth group that has eighty-nine protons in each nucleus. (symbol: Ac) |
affix |
in grammar, a word element that, when added to a word, modifies its meaning or function; prefix, infix, or suffix. [1/5 definitions] |
Ag |
symbol of the chemical element silver. |
Al |
symbol of the chemical element aluminum. |
allotrope |
one of several forms in which a chemical element may exist. |
alloy |
to degrade the purity of by the addition of some element; adulterate. [1/5 definitions] |
aluminum |
a strong, light, silver metal that does not easily rust. Aluminum is a chemical element. (symbol: Al) |
Am |
symbol of the chemical element americium. |
americium |
a synthetic radioactive chemical element that has ninety-five protons in each nucleus. (symbol: Am) |
animus |
In Jungian psychology, the archetypal masculine element in a woman's psyche. [1/3 definitions] |
antimony |
a chemical element that has fifty-one protons in each nucleus and forms a brittle bluish white metal crystal, used in hard alloys, electrical components, and medicines. (symbol: Sb) |
Ar |
symbol of the chemical element argon. |
arch1 |
a structural element, usu. of masonry, that is curved and used to span an open space such as a door. [2/5 definitions] |
argon |
a chemical element of the inert gas group that has eighteen protons in each nucleus. (symbol: Ar) |
arsenic |
a poisonous chemical element that has thirty-three protons in each nucleus and occurs in brittle, grayish white crystalline masses or in yellow or black allotropes. (symbol: As) [1/2 definitions] |
As |
symbol of the chemical element arsenic. |
aspect |
a part or element. [1/4 definitions] |
astatine |
a highly radioactive chemical element of the halogen group that has eighty-five protons in each nucleus. (symbol: At) |
At |
symbol of the chemical element astatine. |
atom |
the smallest possible unit of a chemical element. |