subintrant
/ˌsʌbˈɪntr(ə)nt/Medicine
adjective
Of a fever or (in later use) other disease or condition: characterized by repeated attacks that begin before the previous one has ended.
Origin
Late 17th century (in an earlier sense). As noun from post-classical Latin subintrant-, subintrans, use as noun of subintrant-, subintrans, present participle.