China 
Africa 
- Conception
- Conceptus
- Concerted Evolution
- Concha bullosa
- Concoctions
- Concomitant
- Concomitant drugs
- Concordance
- Concordance Correlation Coefficient
- Concordant pairs
- Concussion
- Condensation
- Condensation particle counter
- Condensed tannins
- Condensers
- Condensing osteitis
- Conditional distribution
- Conditional probability
- Conditional variance
- Conditioned emotional response
- Conditioned place preference
- Conditioned play audiometry
- Conditioned reflex
- Conditioned response
- Conditioned stimulus
- Conditioned taste aversion
- Conditioners
- Conditioning
- Condolences
- Condom catheter
- Condoms
- Conduct disorder
- Conduct disorders
- Conduction aphasia
- Conductive hearing loss
- Conductive polymers
- Conductivity
- Conduritol
- Condylar
- Condylar hyperplasia
- Condyles
- Condyloid process
- Condyloma
- Condyloma acuminatum
- Cone beam computed tomography
- Cone beam reconstruction
- Cone cell
- Cone dystrophy
- Cone of light
- Cone opsin
- Cone rod dystrophy
- Cone-beam computed tomography
- Conessine
- Confabulation
- Confidentiality
- Confined placental mosaicism
- Confined space
- Confinement
- Confirmation bias
- Confirmatory factor analysis
- Confirmatory trial
- Confluence of sinuses
- Confluent and reticulated papillomatosis
- Confocal laser scanning microscopy
- Confocal microscopy
- Conformation
- Conformational change
- Conformational ensembles
- Conformational entropy
- Conformational epitope
- Confounders
- Confounding factors
- Confounding variables
- Confusion
- Confusion Assessment Method
- Confusional arousal
- Congeners
- Congenic
- Congenic strains
- Congenital
- Congenital abnormalities
- Congenital absence of the vas deferens
- Congenital adrenal hyperplasia
- Congenital adrenal hyperplasia due to 21-hydroxylase deficiency
- Congenital afibrinogenemia
- Congenital amegakaryocytic thrombocytopenia
- Congenital amputation
- Congenital analgesia
- Congenital anomaly
- Congenital blindness
- Congenital cataract
- Congenital central hypoventilation syndrome
- Congenital chloride diarrhea
- Congenital chloride diarrhoea
- Congenital contractural arachnodactyly
- Congenital cystic adenomatoid malformation
- Congenital cytomegalovirus infection
- Congenital deafness
- Congenital diaphragmatic hernia
- Congenital disorder
- Congenital disorder of glycosylation
- Congenital disorders
- Congenital dyserythropoietic anemia
- Congenital epulis
- Congenital erythropoietic porphyria
- Congenital fiber type disproportion
- Congenital fibrosis of the extraocular muscles
- Congenital fourth nerve palsy
- Congenital glaucoma
- Congenital hearing loss
- Congenital heart block
- Congenital heart defects
- Congenital heart disease
- Congenital hemolytic anemia
- Congenital hepatic fibrosis
- Congenital hip dislocation
- Congenital hydrocephalus
- Congenital hyperinsulinism
- Congenital hypothyroidism
- Congenital ichthyosiform erythroderma
- Congenital ichthyosis
- Congenital infection
- Congenital insensitivity to pain
- Congenital insensitivity to pain with anhidrosis
- Congenital lymphedema
- Congenital malformations
- Congenital melanocytic nevi
- Congenital muscular dystrophy
- Congenital myasthenic syndrome
- Congenital myopathy
- Congenital nephrotic syndrome
- Congenital nevus
- Congenital nystagmus
- Congenital pulmonary airway malformation
- Congenital rubella syndrome
- Congenital stationary night blindness
- Congenital syphilis
- Congenital toxoplasmosis
- Congestive cardiomyopathy
- Congestive heart failure
- Congestive hepatopathy
- Congo red
- Conidiobolomycosis
- Coniferyl aldehyde
- Coniine
- Conium
- Conivaptan
- Conization
- Conjoined twins
- Conjoint analysis