名詞 arithmetic:

1. the branch of pure mathematics dealing with the theory of numerical calculations

形容詞 arithmetic:

1. relating to or involving arithmetic
   同義詞：arithmetical

1. A generalization of arithmetic in which symbols, usually letters of the alphabet, represent numbers or members of a specified set of numbers and are related by operations that hold for all numbers in the set.
   代數(shù)學計算的普遍原理，其中通常為字母表中字母的符號，其代表數(shù)字或一組特定數(shù)字中的幾個數(shù)字，它們通過對組中全部數(shù)字都適合的運算法則相聯(lián)系
2. A string of one or more characters used to separate or organize elements of computer programs or data; for example, parentheses, blank character, arithmetic operator, if, "BEGIN".
   用來分隔或組織計算機程序元素或數(shù)據(jù)元素的字符或字符串。例如括號、空格符、算術運算符、if(如果)、“BEGIN＂等。
3. I'm good at history but not so hot at arithmetic.
   我的歷史成績不錯，但算術不太好。
4. The little boy was not good at arithmetic.
   這個小男孩算術不太好。

a.rith.me.tic

n.Mathematics （名詞）【數(shù)學】
The mathematics of integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division.
算術：整數(shù)，有理數(shù)，實數(shù)或復數(shù)進行加，減，乘和除的運算
A book on this kind of mathematics.
算術教科書：關于這種運算的書

來源：
Middle English arsmetike, arithmetic
中古英語 arsmetike, arithmetic
from Old French arismetique
源自 古法語 arismetique
from Late Latin arismetica
源自 后期拉丁語 arismetica
alteration of Latin arithmôtica
拉丁語 arithmôtica的變化
from Greek arithmôtikô tekhnô [(the art) of counting]
源自 希臘語 arithmôtikô tekhnô [計數(shù)的（藝術）]
from arithmein [to count]
源自 arithmein [計算]
from arithmos [number] * see ar-
源自 arithmos [數(shù)字] *參見 ar-

【引伸】
ar.ithmet.ic
ar.ithmet.ically
adv.（副詞）
arith.meti.cian