- Catastrophic injury
- Catastrophism
- Catchment hydrology
- Catechin
- Catechol
- Catechol dioxygenase
- Catechol oxidase
- Catechol-o-methyltransferase
- Catecholaminergic
- Catecholamines
- Categorical distribution
- Categorical variables
- Categorization
- Category theory
- Catenanes
- Catenary
- Catenin
- Catenoid
- Cathelicidin
- Cathepsin
- Cathepsin k
- Catheter ablation
- Catheterization laboratory
- Catheti
- Cathode ray
- Cathodic
- Cathodic arc deposition
- Cathodic protection
- Cathodoluminescence
- Catio3
- Cation diffusion facilitator
- Cationic polymerization
- Cativa process
- Cattierite
- Cauchy distribution
- Cauchy elastic material
- Cauchy momentum equation
- Cauchy problem
- Cauchy sequences
- Cauchy stress tensor
- Cauda equina
- Cauda equina syndrome
- Caudal
- Caudate nucleus
- Caulk
- Caulking
- Caulobacter
- Caulobacter crescentus
- Causal analysis
- Causal filter
- Causal graphs
- Causal inference
- Causal models
- Causal structure
- Cause of autism
- Cause of death
- Caustic
- Caustics
- Cauterization
- Cave-dwelling
- Cave-ins
- Caveolae
- Caveolin
- Caves
- Cavitand
- Cavitation
- Cavitation number
- Cavity magnetron
- Cavity optomechanics
- Cavity quantum electrodynamics
- Cavity resonator
- Cavity walls
- Cayley graphs
- Cayley transform
- Cbl
- Cd11c
- Cd137
- Cd25
- Cd45
- Cd63
- Cd80
- Cd86
- CdTe
- Cdma2000
- Cecal
- Cefalexin
- Cefixime
- Cefotaxime
- Cefuroxime
- Ceiling
- Ceiling effect
- Ceiling fans
- Celadonite
- Celastrol
- Celeron
- Celestial equator
- Celestial sphere
- Celestine
- Celiac artery
- Celiac disease
- Cell adhesion
- Cell adhesion molecules
- Cell bank
- Cell cortex
- Cell count
- Cell counting
- Cell culture
- Cell culture assays
- Cell cycle analysis
- Cell damage
- Cell death
- Cell decomposition
- Cell disruption
- Cell division
- Cell encapsulation
- Cell envelope
- Cell fate
- Cell fusion
- Cell junctions
- Cell mechanics
- Cell membrane
- Cell migration
- Cell nucleus
- Cell physiology
- Cell polarity
- Cell potency
- Cell signaling
- Cell site
- Cell sorting
- Cell surface receptors
- Cell survival curve
- Cell suspension
- Cell theory
- Cell therapy
- Cell transmission model
- Cell types
- Cell wall
- Cell-free
- Cell-mediated immunity
- Cell-penetrating peptides
- CellML
- CellProfiler
- Cellobiose dehydrogenase
- Cellobiose phosphorylase
- Cellodextrin
- Cellomics
- Cellular Potts model
- Cellular architecture
- Cellular automata
- Cellular beam