| A | B |
| Cere | a fleshy covering of the base of the upper mandiblethrough which the nostrils open |
| Cloaca | common ”exit” for digestive, urinary and reproductive systems in birds and reptiles |
| Crop | food storage organ |
| Heterophils | neutrophils in birds and reptiles |
| Keel | breast bone of bird |
| Molting | replacement of all or part of the feathers |
| Piloerection | reflex of extending feathers out, a function of keeping warm. |
| Pneumatic bones | hollow bones lacking bone marrow |
| Preening | process by which birds groom and care for their feathers |
| Proventriculus | glandular stomach |
| Sexual dimorphism | Differences between male and female of same species by appearance, plumage color |
| Syrinx | sound producing organ in birds |
| Uropygial gland | large gland at the base of a bird's tail that secretes oil used in preening. |
| Ventriculus | gizzard – grinds food |
| Biliverdinuria | urates stained yellow or green |
| Chelation | use of another molecule to bind to a toxin and remove from the body |
| Choana | open slit in roof of mouth of birds that connects to sinuses |
| Elementary body | life stage of chlamydial organism |
| Hyperpnea | increased depth of breathing |
| PFBD | Psittacine Beak and Feather Disease |
| Raptor | bird of prey |
| Dooking | “giggling” sound of ferrets |
| Fitch | natural sable color of ferrets |
| Kindling | parturition in ferrets |
| Ptyalism | excessive salivation |
| Hob | intact male ferret |
| Jill | intact female ferret |
| Gib | neutered male ferret |
| Sprite | spayed female ferret |
| Arboreal | lives in trees |
| Autonomy | defense mechanism of some lizards to shed its tail if captured by tail |
| Azurophils | unique blood cell to reptiles; believed to be monocytes |
| Dysecdysis | difficult shedding or failure to shed skin normally in reptiles |
| Ecdysis | normal shedding of skin in reptiles |
| Infrared receptors | sensitive to heat changes to help snakes detect prey |
| Intracelomically | in to body cavity |
| Metanephric | embryo-like kidney |
| Osteoderms | bony deposits forming scales, plates or other structures in skin in some reptiles |
| Oviparous | lay eggs before the embryos start developing |
| Ovoviviparous | lay eggs that have young nearly fully developed already |
| Poikilothermic | rely on environmental temperature to maintain body temperature & metabolic processes |
| POTR | preferred optimum temperature range |
| Scutes | bony external plate (turtle shell) |
| Spectacle | transparent protective membrane of snake’s eyes; does not touch cornea & is shed |
| Spurs | vestiges of hind limbs in pythons & boas |
| Stomatitis | inflammation of oral mucosa |
| Vasovagal response | induction of quiescent state by applying gentle pressure to eyes |
| Viviparous | give birth to live young |