Poultry Science Terminology - Q-R

Radiation: exchange of heat between two objects that are not touching

Raft: group of ducks floating together but they can also  be called a badelynge, a bunch, a brace, a flock, a paddling, a team, or a dover

Rales: abnormal sounds coming from the airways of birds

Random samples tests: independent guide for testing performance of poultry birds under identical conditions by collecting eggs randomly from breeder flocks and testing the progeny

Range fed: description of chickens that are allowed to range pasture

Rasp: group of guinea fowl; also called a confusion, mob, or flock

Ration: combination of feed ingredients formulated to meet a bird's nutritional requirements to be consumed in a single day

Ratite: type of domestic bird that does not have a keel bone including: ostriches, emus and rheas 

Rattling: abnormal sounds coming from the throat

Reactor: bird that reacts positively to a test for an infectious disease

Recycle: force into a molt with a cessation of egg production

Relative humidity: amount (percentage) of moisture saturation in the air compared to the amount of moisture air can "hold" at that temperature. There is a direct relationship between temperature and relative humidity – as the temperature increases, the relative humidity decreases and as temperature decreases, the relative humidity increases

Renal: pertaining to the kidneys 

Render: process by which slaughter by-product are treated (grinding, extraction, heat or other treatments) to convert them into protein products for use in feed rations and fertilizers 

Replacements: term used to describe young birds that will replace an older flock

Reportable disease: disease so serious it must, by law, be reported to a state or federal veterinarian

Reservoir of infection: animate or inanimate object on which an infectious agent survives and multiplies and from which it can be transmitted to a susceptible host

Respiration rate: number of cycles per minute by which air is moved into and out of the lungs

Resistance: immunity to infection

Restrict feeding: managed controlling of feeding

Restricted egg: check, dirty, leaker or otherwise inedible egg

Rhinitis: inflammation of the lining of the nasal passages

Rigor mortis: stiffness of muscles caused by a series of chemical changes after death

Roach back: deformed, hunched back (a disqualification when showing poultry) 

Roaster: meat-type chicken raised to a size that makes them suitable for roasting 

Roost: perch, typically inside a coop, where chickens can get off the floor to rest or sleep 

Rooster: adult male chicken at least 1 year old; rarely used as meat birds because they have coarse skin, toughened and darkened meat, and a hardened chest bone 

Rooster egg: very small egg containing no yolk, also called a wind egg or fart egg. (NOT actually laid be roosters)

Rose comb: flat broad comb that is similar in shape to a rose petal

Roup: condition involving chronic infection of skull membranes, characterized by facial swelling

Rumpless: genetic trait in some chicken breeds where they have no tail. They lack an oil gland or even a partial tail examples breeds include Araucanas and Manx Rumpies

Run: enclosed area outdoors that is connected to a coop and allows chickens to roam freely



Back to Poultry Science