# Bolus: plain-language definition

Canonical: [https://followyourswallow.com/glossary/bolus](https://followyourswallow.com/glossary/bolus)

A bolus is the ball of food or sip of liquid you are swallowing at that moment, after it has been chewed and mixed with saliva.

## In plain language

Bolus is the word clinicians use for whatever you are swallowing right then. It might be a bite of chicken, a sip of water, or a spoonful of applesauce. When you chew, your tongue gathers the food, mixes it with saliva, and shapes it into one soft, moist clump. That clump is the bolus.

Reports use the word because it is shorter than writing out "the bite of food" over and over. You will see sentences like "the bolus was held in the mouth" or "part of the bolus remained in the throat." Each one is simply describing where that particular mouthful went.

A swallow study usually looks at several different boluses, one at a time: thin liquid, thicker liquid, puree, a cracker. That is on purpose. A person's swallow can behave differently depending on what is in the mouth, so each one gets its own note.


## Why a clinician looks at this

Describing each bolus separately lets the speech-language pathologist record exactly which textures and amounts moved smoothly and which ones did not, instead of lumping every swallow together. It is a way of being precise, not a judgment about any one bite.

## Sources

- [StatPearls (NCBI Bookshelf): Anatomy, Head and Neck, Tongue](https://www.ncbi.nlm.nih.gov/books/NBK507782/)


Source checked: 2026-08-07

Clinical review: SLP review in progress

## Safety

This is a general definition, not an interpretation of a person's report. Ask the clinician who performed the study what the term means for that person.