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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121 There is many a fair thing full false. 
122 A lazy youth, a lousy age.
123 One good mother is worth a hundred schoolmasters. George Herbert
124 Every man has a fool in his sleeve.
125 A fool’s bolt may sometimes hit the mark.
126 It is a wise man that never makes mistakes.
127 Love all, trust a few, be false to none.
128 A fool’s heart dances on his lips.
129 The wise man is always a good listener.
130 Judge not a book by its cover.
131 A fair face may hide a foul heart.
132 Why keep a dog and bark yourself?
133 An nod is as good as a wink to a blind horse.
134 When a man is wrapped up in himself he makes a pretty little package22.
135 Learning is a bitter root,(sentencedict .com) but it bears sweet fruit.
136 A body without knowledge is like a house without a foundation.
137 In education we are striving not to teach youth to make a living, but to make a life.
138 He that regards not a penny, will lavish a pound.
139 As a modern parent, I know that it's not how much you give children those counts, it's the love and attention you shower on them.A caring attitude can not only save you a small fortune, but also even make you feel good about being tight-fisted and offering more care than presents.
140 Where theren is a flatterer there is also a fool.
141 Between the cup and the lip a morsel may slip.
142 It is a blind silly goose that comes to the fox’s sermon.
143 A dog will not howl if you beat him with a bone.
144 A straight foot is not afraid of a crooked shoe.
145 A wise man is never less alone than when (he is) alone.
146 A novel is a mirror walking along a main road.
147 A journey of a thousand miles begins with a single step.
148 Where there is a will, there is a way(or skill).
149 Happiness is a perfume you cannot pour on others without getting a few drops on yourself.
150 It is no honour for an eagle to vanquish a dove.