deciduous
B2CEFR level
30/100Rarity: fairly common
TechnicalRegister
Relating to the first set of temporary teeth that are later shed.
The deciduous molar was loose and about to be replaced by the adult tooth beneath.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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