logarithm

n. 对数
【经】 对数

副词:logarithmically 形容词:logarithmic 

log.a.rithm

n.Mathematics （名词）【数学】
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.
对数：为使某数等于一给定数而必须取的乘幂的幂指数。如果n x=a, ，以 a 为底 n 的对数就是 x ；表示为log na=x 。如，0 3=,000；于是log 0,000=3。通常使用的有常用对数和自然对数

来源：
New Latin logarithmus
现代拉丁语 logarithmus
Greek logos [reason, proportion] * see leg-
希腊语 logos [原因，均衡] *参见 leg-
Greek arithmos [number] * see ar-
希腊语 arithmos [数字] *参见 ar-

【引伸】
log.arith.mic

log.arith.mically
adv.（副词）