adding machine
A simple mechanical or electromechanical calculator that could only perform simple calculations such as addition or subtraction
Alternative spelling of anti-predator
(chemistry) The introduction of a single tosyl group into a compound
(geology) The geologic period within the Mesozoic era that comprises lower and upper epochs from about 146 to 66 million years ago.
祖父は古い加算専用の機械式計算機を机に置いていて、何十年にもわたる簡単な計算で黄ばんだキーがすり減っていた。
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