List of Medical Roots, Suffixes and Prefixes - Prefixes and Suffixes

Prefix/suffix	Meaning	Origin language and etymology	Example(s)
tachy-	Denoting something as fast, irregularly fast	Ancient Greek ταχύς (tachys), fast, quickly	Tachycardia
-tension, -tensive	pressure	Latin	Hypertension
tetan-	rigid, tense		tetanus
thec-	case, sheath	Ancient Greek θήκη (theke)	Intrathecal
thel(e)-, thel(o)-	Of or pertaining to a nipple	Ancient Greek θηλή (thēlē), a teat, nipple	Theleplasty
thely-	Denoting something as 'relating to a woman, feminine'	Ancient Greek θῆλυς (thēlys), female, feminine	Thelygenous
therap(o)-	treatment	Ancient Greek (therapeía)	hydrotherapy
therm(o)-	heat	Ancient Greek θερμός (thermós)
thorac(i)-, thorac(o)-, thoracico-	Of or pertaining to the upper chest, chest; the area above the breast and under the neck	Latin (thōrāx) < Ancient Greek θώραξ (thōrax), chest, cuirass	Thorax
thromb(o)-	Of or relating to a blood clot, clotting of blood	Ancient Greek θρόμβος (thrómbos), lump, piece, clot of blood	Thrombus, Thrombocytopenia
thyr(o)-	thyroid	Greek θυρεο-ειδής
thym(o)(ia)-	emotions	Greek: "thymos," spirit, soul; courage; breath, mind, emotions	dysthymia
-tic	pertaining to	Greek -τικός
toco-	childbirth	Greek τόκος
-tome	cutting instrument	Greek τομή
-tomy	act of cutting; incising, incision	Greek -τομία	Gastrotomy
tono-	tone, tension, pressure	Greek τόνος
-tony	tension	Greek -τονία
top(o)-	place, topical	Greek τόπος	Topical anesthetic
tort(i)-	twisted	Latin tortus	Torticollis
tox(i)-, tox(o)-, toxic(o)-	toxin, poison	Greek τοξικόν	Toxoplasmosis
trache(a)-	trachea	Greek τραχεία	Tracheotomy
trachel(o)-	Of or pertaining to the neck	Ancient Greek τράχηλος (tráchēlos), neck	tracheloplasty
trans-	Denoting something as moving or situated 'across' or 'through'	Latin (trāns), across, through	Transfusion
tri-	three	Latin	triangle
trich(i)-, trichia, trich(o)-	Of or pertaining to hair, hair-like structure	Ancient Greek θρίξ, τριχ(ο)- (thríx, trich(o)-), hair	Trichocyst
-tripsy	crushing	Greek τρίψις	Lithotripsy
-trophy	nourishment, development	Greek -τροφία, τροφή	Pseudohypertrophy
tympan(o)-	eardrum	Greek τύμπανον	Tympanocentesis

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