名詞 logarithm:

1. the exponent required to produce a given number
   同義詞：log

log.a.rithm

n.Mathematics （名詞）【數(shù)學】
The power to which a base, usually 0, must be raised to produce a given number. Ifn x = a, the logarithm of a, with n as the base, is x; symbolically, log n a = x. For example, 0 3 = ,000; therefore, log 0 ,000 = 3. The kinds most often used are the common logarithm and the natural logarithm.
對數(shù)：為使某數(shù)等于一給定數(shù)而必須取的乘冪的冪指數(shù)。如果n x=a, ，以 a 為底 n 的對數(shù)就是 x ；表示為log na=x 。如，0 3=,000；于是log 0,000=3。通常使用的有常用對數(shù)和自然對數(shù)

來源：
New Latin logarithmus
現(xiàn)代拉丁語 logarithmus
Greek logos [reason, proportion] * see leg-
希臘語 logos [原因，均衡] *參見 leg-
Greek arithmos [number] * see ar-
希臘語 arithmos [數(shù)字] *參見 ar-

【引伸】
log.arith.mic
log.arith.mically
adv.（副詞）