- Clinical data management
- Clinical death
- Clinical decision making
- Clinical decision support system
- Clinical dementia rating
- Clinical effectiveness
- Clinical electrophysiology
- Clinical endpoint
- Clinical epidemiology
- Clinical equipoise
- Clinical examination
- Clinical formulation
- Clinical genetics
- Clinical guidelines
- Clinical imaging
- Clinical immunology
- Clinical information system
- Clinical laboratory
- Clinical medicine
- Clinical method
- Clinical microbiology
- Clinical negligence
- Clinical neurology
- Clinical neurophysiology
- Clinical neuropsychology
- Clinical nurse specialists
- Clinical pathology
- Clinical peer review
- Clinical pharmacists
- Clinical pharmacology
- Clinical pharmacy
- Clinical prediction rules
- Clinical protocols
- Clinical psychology
- Clinical research
- Clinical research associate
- Clinical research ethics
- Clinical significance
- Clinical social work
- Clinical study design
- Clinical study report
- Clinical supervision
- Clinical toxicology
- Clinical trials
- Clinical trials in India
- Clinical trials on Ayurveda
- Clinical trials unit
- Clinical virology
- Clinically isolated syndrome
- Clinician Administered PTSD Scale
- Clinician-Administered PTSD Scale
- Clinodactyly
- Clinoptilolite
- Clioquinol
- Clitoral
- Clitoral hood
- Clitoromegaly
- Clivus
- Cloacal
- Cloacal exstrophy
- Cloacal membrane
- Clobazam
- Clobenpropit
- Clobetasol
- Clobetasol propionate
- Clobetasone
- Clobetasone butyrate
- Clofarabine
- Clofazimine
- Clofibrate
- Clofibric acid
- Clomethiazole
- Clomifene
- Clomifene citrate
- Clomipramine
- Clonal anergy
- Clonal deletion
- Clonal evolution
- Clonal hematopoiesis
- Clonal interference
- Clonal population
- Clonal selection
- Clonal variation
- Clonality
- Clonazepam
- Clonazolam
- Clone
- Clonidine
- Cloning
- Cloning vector
- Clonogenic assay
- Clonorchiasis
- Clonorchis
- Clonorchis sinensis
- Clonus
- Clopidogrel
- Clorazepate
- Clorgiline
- Closed angle glaucoma
- Closed head injury
- Closed kinetic chain exercises
- Closed testing procedure
- Clostridia
- Clostridioides
- Clostridium
- Clostridium baratii
- Clostridium bifermentans
- Clostridium botulinum
- Clostridium butyricum
- Clostridium chauvoei
- Clostridium difficile
- Clostridium difficile infection
- Clostridium difficile toxin B
- Clostridium histolyticum
- Clostridium innocuum
- Clostridium novyi
- Clostridium perfringens
- Clostridium septicum
- Clostridium sporogenes
- Clostridium tertium
- Clostridium tetani
- Clostripain
- Clot formation
- Clot lysis time
- Clot retraction
- Cloth face masks
- Clothianidin
- Clotiapine
- Clotrimazole
- Clotting time
- Clouding of consciousness
- Clove
- Clove oil
- Cloves
- Cloves syndrome
- Cloxacillin
- Cloxazolam
- Clozapine
- Clozapine N oxide
- ClpX
- Club cells
- Clubfoot
- Clue cells
- Clumping factor A
- Cluster B personality disorder
- Cluster B personality disorders
- Cluster analysis
- Cluster decay
- Cluster headaches
- Cluster of differentiation