- Carrier
- CC – Cubic Centimeter
- Cell
- Central Venous Catheter
- Cephalosporins
- CFRD – Cystic Fibrosis-Related Diabetes
- CFTR – Cystic Fibrosis Conductance Transmembrane Regulator
- Chromosome
- Chronic
- Cirrhosis
- Clinical
- Clinical Assessment
- Clinical Investigator
- Clinical Study
- Clinical Trial
- Compassionate Use
- Computed Tomography (CT)
- Condensate
- Confidentiality
- Contraindicated
- Contrast Enhanced Ultrasound
- Control Group
- CPT – Chest Percussion Therapy
- Cystic fibrosis
- Pancreas
- Pancreatic Duct
- Phase 1 Trials
- Phase 2 Trials
- Phase 3 Trials
- Phase 4 Trials
- Phlegm
- PIC Line
- Placebo
- Placebo Effect
- Placebo-Controlled Study
- Pneumonia
- Portacath (Port)
- Pre-clinical
- Principal Investigator (PI)
- Procedure
- Pseudomonas Aeruginosa
- PT (Physical Therapist)
- Pulmonary Function Test (PFT)
- Pulmozyme
