Gumpalan bola makanan yang bercampur dengan liur dan siap menuju kerongkongan.

Merriam-Webster Online Dictionary
bolus (noun)
a rounded mass as
a) a large pill
b) a soft mass of chewed food
a) a dose of a substance (as a drug) given intravenously
b) a large dose of a substance given by injection for the purpose of rapidly achieving the needed therapeutic concentration in the bloodstream
Bolus (Wikipedia)

Bolus can refer to