a. (sb.) Path. [ad. L. subintrant-em, pr. pple. of subintrāre to steal into, f. sub- SUB- 24 + intrāre to ENTER. Cf. F. subintrant, It. subentrante.] Of fevers: Having paroxysms so rapidly that before one is over another begins; also said of the paroxysms. b. sb. A subintrant fever.
1684. trans. Bonets Merc. Compit., VI. 231. In a subintrant (that is, when one fit comes before the other is off).
1747. trans. Astrucs Fevers, 102. A subintrant tertian.
1886. Lond. Med. Rec., 15 Oct., 463/1. The hysterical attacks at this juncture were constant, sometimes subintrant.
1897. Allbutts Syst. Med., II. 317. A remittent of the double tertian type, or double tertian with subintrant paroxysms. Ibid. (1899), VIII. 467. The fever may be confined only to the eruptive period, and be ephemeral, remittent, subintrant [&c.].