altricial
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
Born or hatched blind, naked and helpless, requiring prolonged parental care.
Robins are altricial, their nestlings little more than gaping mouths for the first days.
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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