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prothecae nstresses
Gruzovik, zool. проте́ки (the basal and first-formed parts of the calyculus of a coral)
protheca [prəu'θiːkə] n
Gruzovik, zool. проте́ка (pl. prothecae; the basal and first-formed part of the calyculus of a coral)
paleont. протёка