| 释义 |
rar·e·fac·tion
\|ra(a)rə|fakshən, |rer-\ noun
(-s)
Etymology: French or Medieval Latin; French raréfaction, from Middle French rarefaction, from Medieval Latin rarefaction-, rarefactio, from Latin rarefactus (past participle of rarefacere to rarefy) + -ion-, -io -ion — more at rarefy
1. : the act or process of rarefying
2. : the quality or state of being rarefied
< rarefaction of bone >
3. : a state or region of minimum pressure in a medium transversed by compression waves (as sound waves) — compare condensation 4b
• rar·e·fac·tion·al \-shənəl, -shnəl\ adjective |