AP Biology Prefix, Suffix and Root Word List A a-, an- No, lacking, none andro- Masculine, man ab- Away from, out from anemo- Wind abyss- Deep, bottomless angio- Vessel ac- To, toward ante- Before, ahead of time -aceus, -aceous Of or pertaining to antero- Front acou- Hearing anth- Flower acr-, acro- Extreme, peak anthropo- Man actin- A ray, spoke anti- Against ad- To, toward ap- To, toward adeno- Gland apic- Tip, end aero- The air apo- Off, away agri- Field, soil apsis Juncture -al Having character of aqu- Water alb- White arachn- A spider -alexi To ward off arch- Primitive, ancient -algia Pain arthro- Joint allo- Other, different aster-, astr- Stars alto- High atom- Vapor ambi- On both sides audi- Hear ameb- Change, alteration auto- Self amphi-, ampho-, amb- Leading a double life, both aux- Grow, enlarge ana- Up B bactr- Stick, club bio- Life, living barb- Beard -blast Sprout, germ baro- Weight brachi- Having arms bath- Depth, height branchi- Having fins bene- Well, good brev- Short bentho- Depths bronch- Windpipe bi- Two, twice, double bryo- Moss C cala- insert clade- Branch calor- Heat cline- A slope carb- Coal, carbon cnido- A nettle cardi- Heart co- With, together carn- Meat cocc- Seed carp- Fruit -coel Hallow carpal- Wrist coel- Hollow cata- Down coeno- Common caud- Tail coit- A coming together cell- Storeroom, chamber coleo- A sheath -cene New, recent coll- Glue -centesis A puncture com- With, together centi- Hundredth con- With, together centr- Center coni- Cone cephal- Head contra- Against ceric Neck cope- An oar chem- Chemical corp- Body chlor- Green cortex- Shell choano- Funnel cosmo- World, order, form chondro- Cartilage cotyl- Cup chord- A string counter- Against chrom- Color crani- The skull chym- Juice crypt- Hidden, covered -cide Killing cili- Hair circ- Around, about circa- A circle cirro- Hair like curls D dacty- Finger de- Down, out de- From, down, out deca- Ten deci- Tenth -del Visible deliquese- Become fluid demi- Half dendro- Tree dent- Tooth dentri- Tree derm- Skin detrit- Wear off deutero- Second E ec- Out of, outside ecdys- An escape echin- Spiny, prickly eco- House ect- Outside, without -ectomy Removal of electro- Electric, electricity -ell Small -em Made -emia Blood en- In, into encephal- Brain enchyma- An infusion end-, ent- Within, in F -fer Bear, carry, produce ferro- Iron fertil- Fruitful fibr- Fiber, thread -fid, fis- Divided, split flagell- Whip flect, flex Bend G galact-, galax- Milk, milky fluid gamy- Marriage gastro- Stomach -gen; -gine Producer, farmer -gene, -geny Origin geo- Land, earth -gest Carry, produce glia- Glue glob- All, round glomer- A ball glottis- Mouth of windpipe glyco- Sweet cumul- Heaped cuti- Skin -cycl Ring, circle cyst- Bladder, pouch cyt-, cyte- Cell, receptacle di- Two, double dia- Through, across digit- Finger, toe -dilat Expanded din-, dino- Terrible dis- Apart ,out -diure Urinate dorm- Sleep dors- Back du-, duo- Two -duct - Lead dyan- Dark blue dynam- Power dys- Ill, bad enter- Intestines entom- Insect -eous Nature of, like epi- On, above -err Wander, go astray erythro- Red estuar- The sea ethno- Race, people etho- Custom, habiti eu- True eury- Broad, wide ex- Out of extra- Beyond, outside of flor- Flower fluor- Fluorine foli- Leaf form- Shape fract- Break fusi- A spindle gnatho- Jaw -gon Angle, corner -gony Offspring, generation grade Step, division -gram Writing, record -graphy, graph Writing, record -grav Heavy gross - Thick gry- Ring, circle, spiral gymno- Naked gyn Female H haem-, men- Blood -hal, -hale Breathe, breath halo- Sea, salt haplo- Single hecto- Hundred helio Sun -helminth - Worm hemi- Half hepat- Liver herb- Grass hermaphro- Both male and female hetero- Different hex- Six hibern- Winter I -ia, iasis Disease of ichthy- Fish ign- Fire im- Not immuno- Safe, free imuno- Safe, free in- To, toward, into in- Not, without -ine Of, pertaining to infra- Below, beneath J juxta- Near to K karyo- Nucleus kilo- Thousand L lachry Tear lact- Milk lamin- Sheet, layer lat- Side, flank lepido- Scale -less Without leuc- White, bright, light liga- Bound, tied lign- Wood limn- Lake lin- Line M macro- Large mal- Bad malle- Hammer mamm- Breast marg- Border, edge marsupi- A pouch or bag mast- Breast mechano- An instrument med- Middle meg- Great, million, large meio- Less mela-, melan- Black, dark hipp- Horse hist- Tissue holo- Entire, whole homin- Man homo- Same hort- Garden hybrid - Mongrel hydr- Water hygr- Wet, moist hyl- matter hyper- Above, beyond, over hypho- Weaving hypno- Sleep hypo- Beneath, under, less inter- Between intra- Within, inside intro- Into, within iodo- Violet -ion Go, come -ism A state or condition iso- Equal, same itero- To repeat -itis Inflammation, disease kine- Movement lingu- Tongue lip- Fat liqu- Become fluid lith-, -lite Stone, petrifying littor- Sea shore loc- Place -logy Study lopho- A lut- Yellow -lysis, -lyte, -lyst, lyso- Split meteor- Lofty, high, in air -meter, -metr- Measure micro- Small mis- Wrong, incorrect -missi Send mole- Mass mono- One, single mont- Mountain morph- Shape, form mort- Death mov-, mot - Move multi- Many mell- Soft menstru Month -mer A part mere- A part mes- Middle, half met-, meta- Between, along after N nas- Nose nema- Thread neo- New, recent nephro- Kidney -ner Moist, liquid neur-, nerv- Nerve, tendon neutr- Neither neutro- Neutral noci- Harm O ob- Against oct- Eight ocul- Eye odent- Tooth -oid Similar in form or shape olf- Smell oligio- Few, small oligio- Small, scant -oma Tumor omma- The eye omni - All onco- Tumor P pachy- Thick paedo- Child paleo- Old, ancient palm- Broad, flat pan- All par- Beside, near, equal parous- Bearing parsi- Few partheno- A virgin partur- Giving birth passeri- A sparrow path-, -pathy Disease, suffering patri- Father pedi- Beginning, child pellecid- Transparent per- Through, around perag- The sea peri- Around, on all sides perman- Remaining permea- Pass, go phag- Eat pheno- Show, appear phil- Loving, fond of -phobia Excessive fear of phon-, phone Sound -phore To carry muta- Change mutu- Reciprocal mycel- Threadlike mycet-, myco- Fungus myo- Muscle myria- Many noct-, nox- Night -node Knot nom- Name -nomy, -nome Distribute, arrange, law non- Not noto- Back nuc- Center nucleo- Nucleus oo- Egg opercul- A covering, lid opt-, -opay - Circle, round, ring opthal - Eye, vision orb- Straight, correct, right orth- Mouth -osis Disease of osmo- Pushing osteo- Bone ov- Sharp, acid, oxygen ovum- / ovi- Egg oxy- Sharp phragmo- A partition phyc- Seaweed, algae -phyll Leaf phylo- Tribe physi- Nature, natural qualities -phyte, phyt Plant placo- A plate plan- Roaming, wandering plasm-, -plast Form, formed into pleio- More pleur- Rib, lung pneumo- Lungs, air pod- Foot poly- Many, several pom- Fruit por- Opening port- Carry post- After, behind pro- Before, favoring proto- First, primary pseud- False, deceptive pter- Having wings or fins pterido - Fern pulmo- lung puls- Drive, push pyr- Heat, fire photo- Light Q quadr- Four quiesc- Quiet, resting R radi- Ray, spoke of wheel ratit- Flat bottome re- Again, back rect- Correct, right ren- Kidney ret- Net, made like a net retro- Backward S sacc- A sack sacchari- Sugar salta- Leap sapr- Rotten sarco- Flesh saur- Lizard schizo- Split sci- Know scler- Hard scope Look, observe -scribe, script Write semel- Once semi- Half sept- Partition, seven septic- Infection sex- Six simi- Ape -sis Condition, state of socio- A companion solv- Loosen, free soma- Body somn- Sleep T tachy- Quick, swift tarso- Ankle tax- Arrangement tele- Far off, at a distance telos- An end terr- Earth tetan- Rigid, tense tetr- Four thall- Young shoot -theca A cup, case therm- Heat thigmo- A touch thylaco- Sac or pouch -tom Cut, slice tono- Stretched U -ule Diminutive ultra- Beyond uro- The tail V quin- Five -rhage Flow -rhaphy Suture -rhea Flow rhin- Nose rhiz- Root rhodo- Red rubr- Red son- Sound spasm- Tightening spec-, spic- Look at sperm- Seed spher- Ball -spire Breathe spore- Seed stalsis- A constriction stat- Standing, placed stell- Stars steno- Narrow stereo- Solid, in three dimensions stern- Breast, chest stom-, stome- Mouth -stomy To make an opening into strat- Layer strict- Drawn tight styl- Pillar sub- Under, below super-, supra- Over, above, on top sur- Over, above, on top sym-, syn- Together top- Place toti- All toxic- Poison trachei- Windpipe trans- Across tri- Three trich- Hair trocho- A wheel trop- Turning, changing troph- Food, nurishment -tubul A little pipe tunic- A covering turg- Swollen tympan- A drum uni- One ur- urine utric- A leather bag vacu- Empty vas- Vessel vect- Carry ven-, vent- Come ventr- Belly vestigi- Trace vice- In place of X xanth- Yellow xero- Dry Y -yl - Substance or matter Z zea- A grain zo-, zoa- Animal zona - A belt vig- Strong vit-, viv- Life vitre- Glass vivi- Alive volv- Roll, wander vor- Devour, eat xyl- Wood zyg- Yolk zym- Yeast