Sa-SfSg-SlSm-StSu-SySz-Sz
SSa-Sf
- S1-S5 (sacral vertebrae)
- SA node
- SAA
- Sabin, Florence R.
- Sacral
- Sacrococcygeal
- Sacroiliac joint dysfunction (SI Joint Pain)
- Sacroiliitis
- Sacrum
- Sagittal
- Salabrasion
- Salicylic acid
- Salient
- Saline
- Saliva
- Salt
- Salvage therapy
- Sanguine
- Sapphism
- Sarcoidosis
- Sarcoma
- Scabicide
- Scaffold
- Scaling
- Scan
- Scapula
- Scarification
- Scarlatina
- Schizophrenia
- Scler-
- Sclero-
- Scleroderma
- Sclerosis
- Scopolamine
- Script
- Scrofulous
- Scrotum
- Scrub
- Scrub in
- Scrub up
- Scrubs
- Scurvy
- Seasonal affective disorder (SAD)
- Seborrhea
- Seborrheic dermatitis
- Secondary amenorrhea
- Section
- Section, Cesarean
- Sedative
- Sedimentation rate
- Seizure
- Seizure disorders
- Selective serotonin reuptake inhibitor
- Semen
- Semen DNA analysis
- Senile
- Senility
- Sensation
- Sense
- Sensitivity
- Sensorium
- Sepsis
- Septic
- Septicemia
- Septum
- Septum, heart
- Sequela
- Sequelae
- Sequester
- Ser
- Serendipity
- Serine
- Seroconversion
- Serositis
- Serotonin
- Serration
- Serum
- Serum glutamic oxaloacetic transaminase (SGOT)
- Serum glutamic pyruvic transaminase (SGPT)
- Serving size
- Sesquipedalian
- Seven-day measles
- Sexual sadism
SSg-Sl
- SGOT
- SGPT
- Shark attack
- Shigellosis
- Shin bone fever
- Shin spot
- Shingles
- Ship fever
- Shock
- Shock, secondary
- Short arm of a chromosome
- Shortness of breath
- Shotty
- Shoulder
- SHP
- Shunt
- Sicca syndrome
- Sick sinus syndrome
- Siddha medicine
- Side effects
- Sigmoid
- Sign
- Sign language
- Signature
- Silver
- Silver bullet
- Silver poisoning
- Simian crease
- Sinus
- Sinus bradycardia
- Sinus node
- Sinus rhythm
- Sinusitis
- Situational syncope
- Six fingers or toes
- Skeletal muscle
- Skeleton, bones of the
- Skin
- Skin color
- Skin erosion
- Skin graft, pedicle
- Skull
- Slanted ear
- SLE (systemic lupus erythematosus)
- Sleep
- Sleep apnea
- Sleep drug
- Sleep paralysis
- Sliding hiatal hernia
- SLS (Sjogren-Larsson syndrome)
- SLV
SSm-St
- Small calorie (Calorie)
- Small eye
- Small for gestational age (SGA)
- Small intestine
- Small round blue cell tumor
- Smell
- Smooth muscle
- Snoring
- Snort
- Snot
- Snuff
- Social anxiety disorder
- Sociophobia
- Sodium
- Somatic
- Somnambulism
- Somnolence
- Somnolent
- Sore
- Sore throat
- Spasm
- Spastic colitis
- Spasticity
- Speculum, ear
- Speech-language pathologist
- Speed
- Sperm
- Spermatogenesis
- Sphygmomanometer
- Spinal cord
- Spinal Tap
- Spine
- Spirometry
- Spit
- Spleen
- Splenomegaly
- Split personality
- Spondylitis
- Spontaneous abortion
- Sporadic
- Sporotrichosis
- Spots in front of the eyes
- Sprue, nontropical
- Squamous cells
- SSRI
- St. Anthony's fire
- Standard of care
- Stapes
- Staphylococcal infection
- Staphylococcus
- Stasis
- Stasis ulcer
- STAT
- Statins
- Status epilepticus
- Stenosis
- Stenotic
- Stereotactic
- Sternum
- Sternutation
- Steroid
- Steroid abuse
- Stethoscope
- Stevens-Johnson syndrome
- STI
- Stiff baby syndrome
- Stomach
- Stomach cramps
- Stomach fat (belly fat, abdominal fat)
- Stomach paralysis
- Stool
- Stool occult blood test
- Strain
- Streptococcus
- Streptococcus pneumoniae (pneumococcus)
- Streptococcus pyogenes
- Stress
- Stricture
- Stroke
- Stroke index
- Stroke volume
- Stroma
- STS
- Study population
- Stuffy nose
SSu-Sy
- Sub-
- Subacute
- Subaortic stenosis
- Subarachnoid
- Subarachnoid hemorrhage
- Subclavian
- Subclinical disease
- Subcu
- Subcutaneous
- Subdural
- Subdural hematoma
- Subjacent
- Sublingual
- Subluxation
- Subq
- Substance
- Substance abuse
- Subway diet
- Succenturiate placenta
- Succumb
- Sulcus
- Sulfite sensitivity
- Sulfonamides
- Sulfonylurea
- Sumatriptan
- Sundowning
- Sunflower Syndrome
- Super-
- Superaspirin
- Superbug
- Superficial
- Superfoods
- Superior
- Supination
- Supine
- Supportive care
- Supraventricular tachycardia
- Surfactant
- Surgery
- Surrogacy
- Suture
- Swallowing syncope
- Sweat gland tumor
- Sweating
- Sweating, gustatory
- Swollen tongue
- Sympathetic nervous system
- Symptom
- Symptomatic
- Symptomatic treatment
- Synaptonemal complex
- Syncope
- Syncope, coughing
- Syndemic
- Syndrome
- Syndrome, nervous colon
- Syndrome, post-polio (PPS)
- Syndrome, TAR
- Synesthete
- Synthesis
- Syphilis
- Syringe
- Systemic
- Systemic lupus erythematosus
- Systemic mastocytosis
- Systole
- Systolic