Some scientific words with the prefix 'bi' are:bicepsbiconcavebiconvexbicuspidbidirectionalbifunctionalbifurcatebilateralbilinearbimodalbiologybiped, bipedalbipodbipolarbiracialbisectbisexualbivalve
bicycle
The answer is "bisect". It's kind of tricky with words that start with "bi".
bibbicyclebickerbikerbistrobillbillfoldbillowbiographybiologicalbiologybishopbirdbibliographybicepbibulousbiasbiasedbicameralbicarbonatebifocalsbidbifurcatebigbigamybighorn sheepbigotbilebikinibilateralbilgebiliousbilkbillablebillboardbillfoldbillhookbingebindbiodiversitybinarybinocularsbingobirchbirthbirthdaybisectbisonbisquebismuthbirthratebirthrightbirthmarkbirthstonebiscottibitebitterbittenbittersweetbiweeklybimonthlybivouacbittybifurcatebittersbitmapbite-sizebizarre
Bicycle, Bivalve, biathlon, bifocal, Bituminous.
cat
telephone
voltage
AstronomyAnatomy
Biannual means twice a year.
x-ray
kinetic energy