Definition of A. Meaning of A. Synonyms of A
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Definition of A
aInfinitive In*fin"i*tive, n. [L. infinitivus: cf. F.
infinitif. See Infinite.]
Unlimited; not bounded or restricted; undefined.
Infinitive mood (Gram.), that form of the verb which merely
names the action, and performs the office of a verbal
noun. Some grammarians make two forms in English: (a)
The simple form, as, speak, go, hear, before which to is
commonly placed, as, to speak; to go; to hear. (b) The
form of the imperfect participle, called the infinitive in
-ing; as, going is as easy as standing.
Note: With the auxiliary verbs may, can, must, might, could,
would, and should, the simple infinitive is expressed
without to; as, you may speak; they must hear, etc. The
infinitive usually omits to with the verbs let, dare,
do, bid, make, see, hear, need, etc.; as, let me go;
you dare not tell; make him work; hear him talk, etc.
Note: In Anglo-Saxon, the simple infinitive was not preceded
by to (the sign of modern simple infinitive), but it
had a dative form (sometimes called the gerundial
infinitive) which was preceded by to, and was chiefly
employed in expressing purpose. See Gerund, 2.
Note: The gerundial ending (-anne) not only took the same
form as the simple infinitive (-an), but it was
confounded with the present participle in -ende, or
-inde (later -inge). AA A ([.a] emph. [=a]).
1. [Shortened form of an. AS. [=a]n one. See One.] An
adjective, commonly called the indefinite article, and
signifying one or any, but less emphatically. ``At a
birth'; ``In a word'; ``At a blow'. --Shak.
Note: It is placed before nouns of the singular number
denoting an individual object, or a quality
individualized, before collective nouns, and also
before plural nouns when the adjective few or the
phrase great many or good many is interposed; as, a
dog, a house, a man; a color; a sweetness; a hundred, a
fleet, a regiment; a few persons, a great many days. It
is used for an, for the sake of euphony, before words
beginning with a consonant sound [for exception of
certain words beginning with h, see An]; as, a table,
a woman, a year, a unit, a eulogy, a ewe, a oneness,
such a one, etc. Formally an was used both before
vowels and consonants.
2. [Originally the preposition a (an, on).] In each; to or
for each; as, ``twenty leagues a day', ``a hundred pounds
a year', ``a dollar a yard', etc.
A barbarous corruption of have, of he, and sometimes of it
and of they. ``So would I a done' ``A brushes his hat.'
An expletive, void of sense, to fill up the meter
A merry heart goes all the day, Your sad tires in a
aFerment Fer"ment, n. [L. fermentum ferment (in senses 1 & 2),
perh. for fervimentum, fr. fervere to be boiling hot, boil,
ferment: cf. F. ferment. Cf. 1st Barm, Fervent.]
1. That which causes fermentation, as yeast, barm, or
Note: Ferments are of two kinds: (a) Formed or organized
ferments. (b) Unorganized or structureless ferments.
The latter are also called soluble or chemical
ferments, and enzymes. Ferments of the first class
are as a rule simple microscopic vegetable organisms,
and the fermentations which they engender are due to
their growth and development; as, the acetic ferment,
the butyric ferment, etc. See Fermentation.
Ferments of the second class, on the other hand, are
chemical substances, as a rule soluble in glycerin and
precipitated by alcohol. In action they are catalytic
and, mainly, hydrolytic. Good examples are pepsin of
the dastric juice, ptyalin of the salvia, and disease
of malt. aGastropoda Gas*trop"o*da, n. pl., [NL., fr. Gr. ?, ?, stomach
+ -poda.] (Zo["o]l.)
One of the classes of Mollusca, of great extent. It includes
most of the marine spiral shells, and the land and
fresh-water snails. They generally creep by means of a flat,
muscular disk, or foot, on the ventral side of the body. The
head usually bears one or two pairs of tentacles. See
Mollusca. [Written also Gasteropoda.]
Note: The Gastropoda are divided into three subclasses; viz.:
(a) The Streptoneura or Dioecia, including the
Pectinibranchiata, Rhipidoglossa, Docoglossa, and
Heteropoda. (b) The Euthyneura, including the
Pulmonata and Opisthobranchia. (c) The Amphineura,
including the Polyplacophora and Aplacophora. AA A (named [=a] in the English, and most commonly ["a] in
The first letter of the English and of many other alphabets.
The capital A of the alphabets of Middle and Western Europe,
as also the small letter (a), besides the forms in Italic,
black letter, etc., are all descended from the old Latin A,
which was borrowed from the Greek Alpha, of the same form;
and this was made from the first letter (?) of the
Ph[oe]nician alphabet, the equivalent of the Hebrew Aleph,
and itself from the Egyptian origin. The Aleph was a
consonant letter, with a guttural breath sound that was not
an element of Greek articulation; and the Greeks took it to
represent their vowel Alpha with the ["a] sound, the
Ph[oe]nician alphabet having no vowel symbols. This letter,
in English, is used for several different vowel sounds. See
Guide to pronunciation, [sect][sect] 43-74. The regular long
a, as in fate, etc., is a comparatively modern sound, and has
taken the place of what, till about the early part of the
17th century, was a sound of the quality of ["a] (as in far).
2. (Mus.) The name of the sixth tone in the model major scale
(that in C), or the first tone of the minor scale, which
is named after it the scale in A minor. The second string
of the violin is tuned to the A in the treble staff. -- A
sharp (A[sharp]) is the name of a musical tone
intermediate between A and B. -- A flat (A[flat]) is the
name of a tone intermediate between A and G.
A per se (L. per se by itself), one pre["e]minent; a
O fair Creseide, the flower and A per se Of Troy and
with diacritics: Å å Ǻ ǻ Ḁ ḁ ẚ Ă ă Ặ ặ Ắ ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ȃ ȃ Â â Ậ ậ Ấ ấ Ầ ầ Ẫ ẫ Ẩ ẩ Ả ả Ǎ ǎ Ⱥ ⱥ Ȧ ȧ Ǡ ǡ Ạ ạ Ä ä Ǟ ǟ À à Ȁ ȁ Á á Ā ā Ā̀ ā̀ Ã ã Ą ą Ą́
- equation A value
), a measure
of substituent effects
on the stereochemistry
of cyclohexane Absorbance
(German: [fʁakˈtuːɐ̯] (listen)) is a calligraphic
hand of the Latin alphabet
and any of several blackletter typefaces derived
from this hand....
and superscripted versions
of a number
of characters including a
full set of Arabic
numerals. These characters allow
- or US) or America, is a country mostly located
in central North
America, between Canada
and Mexico. It consists
of 50 states, a federal
- engineer, industrial
designer, technology entrepreneur
and philanthropist. He is a citizen
Africa, Canada, and the United
States. He is the founder...
is a Unicode block
of typographical symbols
of an alphanumeric within a
circle, a bracket
not-closed enclosure, or ending
- List of airports
by IATA code: A
- B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z See also: List of...
- ordinal indicator
character, or group
of characters, following a numeral denoting
that it is an ordinal
than a cardinal
- double-strike a character
with a small offset
typewriter. Thus they are also referred
to as double
struck. In typography, such a
font with characters...
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