
L'ANGLAIS et les préfixes des nombres
Comme en français les préfixes sont très utilisés. Mais plus éloignés du Latin que les français,
les Anglosaxons sont moins familiers avec ceuxci.
Depuis une trent Ce sont des textes qui s'appuient
sur les racines grecques et latines pour étoffer la palette du vocabulaire
anglais. Exemple: sedeo, être assis a donné sedentary,
sediment, sedate, sedative, recede, supersede … Voici un florilège de mots se rapportant aux nombres: 


0,001 
mill 
a thousandth
part of a dollar 

0,001 
millimetre 
one thousandth of a
meter 

0,01 
centimetre 
one hundredth
of a meter 

percent 
means one out of
every hundred (prononcez quelque chose comme: "pe sainte" et non père san) 

0,125 
octoroon 
person with one
eighth Negro blood 

0,5 
halflive 
Interval of time
required for onehalf of the atomic nuclei of a radioactive sample to decay (change
spontaneously into other nuclear species by emitting particles and energy),
or the time required for the number of disintegrations per second of a
radioactive material to decrease by onehalf. 

hemi 
half as in
hemisphere 

semi 
means one half as in: semiannual semiaquatic semiarid semiautomatic
semiautonomous semicentennial semicircle
semicircular semicolon semicomplete semiconscious semicylindrical
semiformal semiherbaceous semilethal semiliterate semilunar
Halfmoon shaped; crescentic. semimetamorphosis
semimicro semiopaque semioviparous semipermeable semiplume semirigid semiskilled semiterrestrial
semitone semitransparent semitropical semiyearly 

semiannual 
to receive semiannual payments
means be paid every sixth months 

semibreve 
a note, semibreve = ronde, ancient français: semibrève. 

semicolon 
punctuation mark 

semifinal 
a match just before
the final 

semiquaver 
a note (quaver = croche) 

semitone 
half a tone in
music 

Suite en Demi et Sesqui
annual 
a yearbook for example 

annuity 
a yearly sum 

unilateral 
unilateral involves only one
side 

1,5 
sesqui 
the Latin prefix means one and a
half 
sequialteral 
One and a half times as great
as another; having the ratio of one and a half to one 

sesquiduplicate 
Having the ratio of two and a
half to one, or of five to two. 

sesquihora 
In medicine, every one and a
half hours 

sesquipedalian 
a sesquipedalian word is 1 ½
feet long sesquipedalian language uses
long and obscure words Is sesquipedalian itself a
sesquipedalian word? 

hippopoto monstro sesquipedalian 
a very, very long word 
2 
bi 
"twoness"
is indicated by bi 
biannual 
a biannual publication comes
out two
times (twice) a year (see biennial) 

bicuspid 
a bicuspid has two points 

bicycle 
a bicycle has two wheels 

biennial 
means occurring once every two
years (see biannual) 

bifocal 
with two focuses 

bigamy 
marriage to two wives, husbands 

bikini 
brief twopiece swimming
costume for women 

bilateral 
bilateral is twosided or
involves two sides 

bilingual 
who speaks two language with
the same fluency 

bimonthly 
is ambiguous in sense, meaning either twice a month or
every two months; they are best avoided. Same for biweekly, biyearly 

bimonthly 
every two months 

binary 
consisting of two 

binoculars 
instrument with separate
eyepiece for each eye 

biped 
a biped has two feet; human
beings are bipeds 

biplane 
an aeroplane with two sets of
wings, one above the other 

bisect 
to cut into two (usually equal)
parts 

bivalve 
as oysters and clams 

duo 
a group of two 

duplicate 
repeated two times 

trilingual 
who speaks three language with
the same fluency 

twin 
two children of the same
mother, born from a single pregnancy 
3 
a threesided geometric figure 

trifocal 
with three focuses 

trio 
a group of three 

triple 
to multiply by three; three
times as big … 

tripled 
folded into three layers 

triplet 
is one of three infants of a single birth three children born from the
same pregnancy 

triplicate 
repeated three times 

tripod 
a stand with three feet, three
legs you can place a astronomer's telescope
securely on a tripod 

trisect 
to cut into three (usually
equal) parts 
4 
quad quadrangle 
a fourside open space
surrounded by buildings 
quadr 
"fourness"
is indicated by quadr 

quadraphonic 
a quadraphonic system transmits
sound through four
loudspeakers 

quadrennial 
means occurring every four
years USA president election is a
quadrennial event 

a foursided geometric figure
such as a square or rectangle 

quadruped 
an elephant is a quadruped;
most mammals are quadrupeds 

quadruple 
to quadruple something is to
multiply it by four 

quadrupled 
folded into four layers 

quadruplet 
is one of four offspring of a single
birth 

quadruplicate 
repeated four times 

quartet 
a group of four 
5 
pentagon 
geometric figure with five
angles (grec gonia,
angle), or five sides (see all xgones) 
Pentagon 
building that houses of the US
Department of Defence 

pentathlon 
competition: swimming,
crosscountry, riding and running, fencing and pistolshooting 

quintet 
a group of five 

quintuplicate 
repeated five times 

6 
hexagon 
geometric figure with six
angles 
sextet 
a group of six (also sestet
in music) 

sextuplicate 
repeated six times 

7 
heptagon 
geometric figure with seven
angles 
September 
seventh month in the early
Roman calendar 

septuplicate 
repeated seven times 

8 
octagon 
geometric figure with eight
angles 
octave 
a series of eight notes 

octet 
eight musicians; lines in a
poem; bits in data processing 

October 
eight month in the early Roman
calendar 

octopus 
seacreature with eight
tentacles 

octosyllable 
a word or a line with eight
syllables 

octuplicate 
repeated eight times 
10 
decade 
period of ten years (attention: décennie en français) 
decagon 
geometric figure with ten
angles 

Decalogue 
another word for Ten
Commandments 

Decameron 
novel by Boccacio
told by Florentines whiling away ten days during aplague 

December 
tenth month in the early Roman
calendar 

decimal 
numbered by tens 

deni 
ten folds 

15 
fornightly 
twice a month or every two
weeks 
50 
semicentennial 
50^{th}
anniversary 
70 
septuagenarian 
who have lived seven decades,
who have passed the age of seventy 
80 
octogenarian 
who have lived eight decades,
who have passed the age of eighty 
90 
nonagenarian 
who have lived nine decades, who
have passed the age of ninety 
100 
cent 
a hundredth part of a dollar 
centenarian 
who have lived hundred years 

centennial centenary 
100^{th}
anniversary; this year , our city celebrates its centennial 

centipede 
a wormlike creature, but 100
feet is outrageously exaggerated a pair of legs on each body segment
(see millipede) 

century 
100 years 

150 
sesquicentennial sesquicentenary 
150^{th}
anniversary; a period of 150 years or occurring every 150 years 
200 
bicentennial bicentenary 
200^{th}
anniversary 
300 
tricentennial tercentennial 
300^{th}
anniversary 
1000 
millennium 
a period of 1000 years combines mille, meaning
thousand, with enn, from Latin annus,
year when the millennium comes is an
expression meaning when all will be peace and happiness it looks as if the millennium
will never come 
1000 
millipede 
a wormlike creature, but 1 000
feet is outrageously exaggerated two pair of legs on each body
segment (see centipede) 
1500 
sesquimellesimus 
1500 th 
last 
penultimate 
the last but one 
infinite 
chronic 
time and time again 
infinite 
perennial 
something that persists through
many years starvation is still perennial in
India poverty continues to be a
perennial problem in the world 
infinite 
perennially 
wife to her husband: why are you perennially angry? 
Suite 
Anglais pour parler des
affaires, du commerce et de la technique 
Voir 
DicoMot des
maths
Expressions utilisées en maths
Langue et linguistique – Index 
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