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单词 acid-free
释义

Definition of acid-free in English:

acid-free

adjective
  • Not containing any acid; (of paper) having neutral or slightly alkaline pH and thus being more resistant to deterioration.

Origin

Late 19th century; earliest use found in The Botanical Gazette.

 
 

Definition of acid-free in US English:

acid-free

adjective
  • Not containing any acid; (of paper) having neutral or slightly alkaline pH and thus being more resistant to deterioration.

Origin

Late 19th century; earliest use found in The Botanical Gazette.

 
 
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更新时间:2026/6/5 22:27:20