Medical terminology is used to precisely describe the human body components, processes, illnesses, medical procedures, and pharmacology. Medical terms are used in the field of medicine, and clinical settings. This section deals with med terms beginning with the letter “T”, and features a list of medical suffixes, prefixes and roots.

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This section was developed for ‘speed learning‘ of medical terminology. Start by reviewing the meanings for a block of medical terms, and then go back and choose a previous term randomly and try to recall the meaning of that particular medical term before hovering over the term to determine the answer. These frequent mini-tests will accelerate the learning process and in a relatively short period of time, you will be able to quickly recall the meaning of all of the listed medical terms. This method of learning is superior to flash cards because of the frequent exposure and testing of your recall.


tachy-   fast
tal/o   talus
tars/o   tarsus; hindfoot or ankle
tauto-   identical, same
tax/o   order; coordination
techn/o   skill, art
tel/o   complete
tele/o   distant
temp/o, tempor/o   period of time, the temples
ten   deca-
ten/o   tendon
tendin/o   tendon
-tension   pressure
tens/o   stretched, strained
tephr/o   gray (ashen)
terat/o   monster; malformed fetus
test/o   testis
tetan/o   tetanus
tetra-   four
thalam/o   thalamus
thalass/o   sea
thanat/o   death
the/o   put; place
thec/o   sheath
thel/o   nipple
therapeut/o   treatment
-therapy   treatment
therm/o   heat
thorac/o   chest

-thorax   chest; pleural cavity
three   tri-
thromb/o   clot
-tropia   to turn
thym/o   thymus gland
-thymia   mind (condition of)
-thymic   pertaining to mind
thyr/o   thyroid gland; sheild
thyroid/o   thyroid gland
tibi/o   tibia (shin bone)
-tic   pertaining to
toc/o   labor; birth
-tocia   labor; birth (condition of)
-tocin   labor; birth (a substance for)
tom/o   to cut
-tome   instrument to cut
-tomy   process of cutting
ton/o   tension
tone/o   to stretch
tonsill/o   tonsil
top/o   place; position; location
torso   twisted
tox/o   poison
toxic/o   poison
trache/o   trachea (windpipe)
trans-   across; through
traumat/o   trauma, injury, wound
trem/o, tremul/o   shaking, trembling
-tresia   opening
tri-   three
trich/o   hair
trigon/o   trigone (area within the bladder)
tri/o   to sort out, sorting
-tripsy   to crush
troph/o   nourishment; development
-trophy   nourishment; development (condition of)
-tropia   to turn
-tropic   turning
-tropin   stimulate; act on
tub/o   tube
tumesc/o, -tumescence   swelling
tympan/o   tympanic membrane (eardrum); middle ear
-type   classification; picture
typhl/o   cecum, blindness

Additional Resources

Check out the following resources to support your learning and understanding of roots, suffixes and prefixes in medical terminology:


ABIC score – Stratification of risk of death in AH
Absolute Neutrophil Count (ANC) Calc and reference ranges
ACC/AHA Guideline -Cholesterol Treatment Protocols
Activities of Daily Living Checklist
Adjusted Body Weight (AjBW) AND Ideal Body Weight (IBW)
Adult Treatment Panel (ATP III) Calculator
Advanced cardiac life support (ACLS) – Adults
Advanced cardiac life support (PALS) – Pediatric
Advanced Mortgage calculator
Advanced Opioid Conversion Calculator -Morphine equivalents
ADVANCED Pharmacokinetics 2010 – 2011
Advanced Vancomycin AUC and Aminoglycoside dosing calc 2019
Aging Males Symptoms (AMS) scale Low Testosterone
Albumin calculator – Hypovolemia
Alcoholic Hepatitis Histological Score (AHHS)
Alligation Calculator (double) – useful in pediatrics
Alligation calculator- (Solutions and topicals) Compounding
Alligation Method Calculator- Creams and ointments
Alteplase (Activase) Calculator – Thrombolytic
Alveolar-arterial Gradient (Aa gradient) determination
Amino acid (essential) dietary calc
Aminoglycosides and Vancomycin dosing (Original calculator)
Androgen Deficiency – Aging Male (ADAM Score) for Low Testosterone
Anemia Calculator For Possible Diagnosis
Anion Gap calculator – Metabolic acidosis
Annual Percentage Rate (APR)/Front End Calculator
APACHE II Severity-of-disease classification system
Argatroban Nomogram, DTIs, other
Arterial Oxygen Content – Oxygenation equation
Asset allocation calculator
ATP IV -ACC/AHA Latest cholesterol Guidelines
ATP-IV -lifetime ASCVD risk -Pooled Cohort Equations