‘Addition is a casting together of two numbers into one number,’ [8/10].
[cifre], [4/1]; the name of the figure 0. The word is derived from the Arabic sifr = empty, nothing. Hence zero.
A cipher is the symbol of the absence of number or of zero quantity. It may be used alone or in conjunction with digits or other ciphers, and in the latter case, according to the position which it occupies relative to the other figures, indicates the absence of units, or tens, or hundreds, etc. The great superiority of the Arabic to all other systems of notation resides in the employment of this symbol. When the cipher is not used, the place value of digits has to be indicated by writing them in assigned rows or columns. Ciphers, however, may be interpolated amongst the significant figures used, and as they sufficiently indicate the positions of the empty rows or columns, the latter need not be indicated in any other way. The practical performance of calculations is thus enormously facilitated (see [p. xvi]).
[componede], [33/24]; composyt, [5/35]; with reference to numbers, one compounded of a multiple of ten and a digit.
[conuertide] = conversely, [46/29], [47/9].
[cubicede], [50/13]; to be c., to have its cube root found.
[cubike nombre], [47/8]; a number formed by multiplying a given number twice by itself, e.g. 27 = 3 × 3 × 3. Now called simply a cube.
[decuple], [22/12]; the product of a number by ten. Tenfold.
[departys] = divides, [5/29].
[digit], [5/30]; digitalle, [33/24]; a number less than ten, represented by one of the nine Arabic numerals.