achene |
a small, dry, hard seed that is attached at a single point and that does not split open when it is mature. |
achieve |
to reach or carry through successfully; accomplish. [3 definitions] |
achievement |
something successfully carried through, esp. through bold or brave action or thought. [2 definitions] |
Achilles |
the hero of The Iliad, who is killed by an arrow in his heel, his only vulnerable spot. |
Achilles heel |
any vulnerable or weak spot, part, or trait. |
Achilles tendon |
the large tendon that connects the calf muscles to the back of the heel. |
achromatic |
consisting of black, gray, or white; colorless. [3 definitions] |
achromic |
lacking color; colorless. |
achy |
feeling an ache or aches. |
acid |
in chemistry, any of a group of substances that usu. dissolve in water, have a sour taste, and form salts in reaction with bases. (Cf. base.) [7 definitions] |
acidic |
like acid in taste, smell, pungency, or the like; acid. [3 definitions] |
acidification |
the process of becoming, or causing to become, acid. |
acidify |
to make or change into acid. [2 definitions] |
acidity |
the characteristic or state of being acid. [3 definitions] |
acidosis |
an abnormally high acidity of body tissues and fluids. |
acid rain |
rain that has high acidity because of being mixed with pollutants such as vehicle exhausts and residues from burning of fossil fuels for energy or from chemical manufacturing. |
acid rock |
a form of music popular in the late 1960s and early 1970s that has loud, often distorted sounds and harmonies, and lyrics that suggest psychedelic experiences. |
acid test |
a stringent, crucial, or definitive test of value or quality. |
acidulate |
to cause to become slightly acid. |
acidulous |
faintly sour in taste; of mild acidity. [2 definitions] |
acinus |
one of the small divisions in an aggregate fruit such as a blackberry. [2 definitions] |