acetylcholine |
in biochemistry, the substance produced during nerve conduction that transmits nerve impulses across synapses and causes muscles to move. [2 definitions] |
acetylene |
a highly flammable colorless gas used esp. to cut and weld metal and to give light. |
acetylsalicylic acid |
aspirin. |
acey-deucy |
a form of backgammon that assigns a special value to a throw of a one or a two. |
Achaea |
an historic region of Greece along the northern coast of the Peloponnesus. [2 definitions] |
Achaean |
of or pertaining to Achaea, a historic region of Greece along the northern coast of the Peloponnesus. [3 definitions] |
ache |
to produce or experience a dull, constant pain. [4 definitions] |
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] |