Latin <span class="searchmatch">pulsus</span> (“stroke”) + bis (“twice”) + feriens (“striking”): "striking a stroke twice". <span class="searchmatch">pulsus</span> <span class="searchmatch">bisferiens</span> (uncountable) English Wikipedia has an article...
bisferious (not comparable) (medicine, of the pulse) Exhibiting <span class="searchmatch">pulsus</span> <span class="searchmatch">bisferiens</span>....