apophysis
C2CEFR level
93/100Rarity: very rare
TechnicalRegister
A bony outgrowth or process that serves as a site of tendon or muscle attachment and has its own ossification centre.
Traction on the tibial tuberosity apophysis underlies the adolescent condition of Osgood-Schlatter disease.
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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