Synonym: A, adenine, amp, ampere, angstrom, angstrom unit, antiophthalmic factor, axerophthol, deoxyadenosine monophosphate, group A, letter a, type A, vitamin A. Similar words: c., e., F., ad, ah, as, at, ha. Meaning: [eɪ;ə] 
n. 1. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation 2. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes 3. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose) 4. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA 5. the basic unit of electric current adopted under the Systeme International d'Unites 6. the 1st letter of the Roman alphabet 7. the blood group whose red cells carry the A antigen.
n. 1. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation 2. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes 3. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose) 4. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA 5. the basic unit of electric current adopted under the Systeme International d'Unites 6. the 1st letter of the Roman alphabet 7. the blood group whose red cells carry the A antigen. 
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91 Life is just a bowl of cherries. 
92 A good winter brings a good summer.
93 Two quarrel and a third profits by it.
94 A tall tree catches the wind.
95 A great ship asks for deep waters.
96 There is a skeleton in every house.
97 Mountains look beautiful from a distance.
98 Give a dog a bad name and hang him.
99 Nothing is impossible to a willing heart.
100 Better a glorious death than a shameful life.
101 A picture paints a thousand words.
102 A common danger causes common action.
103 A crown is no cure for the headache.
104 A great ship asks deep waters.
105 A watched pot is long in boiling.
106 A volunteer is worth twenty pressed men.
107 A danger foreseen is half avoided.
108 Once a devil,(www.Sentencedict.com) always a devil.
109 As a man is, so is his company.
110 A sound mind in a sound body.
111 Rome was not built in a day.
112 It is not good to make a sleeping lion.
113 A little of what you fancy does you good.
114 A light-heeled mother makes a heavy-heeled daughter.
115 Proverbs are the cream of a nation's thought.
116 A word is enough to the wise.
117 Never hang a man twice for one offenece.
118 A man cannot serve two masters.
119 Many a good father hath but a bad son.
120 Business makes a man as well as tries him.