---
kind: "unit"
title: "9"
title_heading: "Animals and Animal Products"
key: "chI/subchE/part101"
level: "part"
label: "Part 101"
heading: "Definitions"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/9/chI-subchE-part101"
sections_count: 7
---

# Part 101 — Definitions

Title 9 C.F.R. — Animals and Animal Products › Chapter I — Animal and Plant Health Inspection Service, Department of Agriculture › Subchapter E — Viruses, Serums, Toxins, and Analogous Products; Organisms and Vectors

## Sections

- [§101.1. Applicability.](/cfr/9/101.1.md)
- [§101.2. Administrative terminology.](/cfr/9/101.2.md)
- [§101.3. Biological products and related terms.](/cfr/9/101.3.md)
- [§101.4. Labeling terminology.](/cfr/9/101.4.md)
- [§101.5. Testing terminology.](/cfr/9/101.5.md)
- [§101.6. Cell cultures.](/cfr/9/101.6.md)
- [§101.7. Seed organisms.](/cfr/9/101.7.md)