I came across this while web surfing and thought it might be helpful for our new members who may not have the extensive years of RV experience that some seasoned veterans have. Hope it helps. And feel free to add to it.

* Artic Package – An RV designed for the colder climes.
* Axle Ratio – The number of times the drive shaft must turn for the axle to turn one time. If you have a 4:1 axle ratio the drive shaft turns 4times for every time the axle turns. The higher the number, the more pulling power you have and the more gas you’ll burn.
* Backup Monitor – A monitor located in the driver’s view showing the back of the RV. Helps you move without trouble.
* Basement Storage – Storage compartments or storage area under the floor of your RV.
* Black Water Holding Tank – You know it better as a septic tank. Make sure to empty it before it hits the 3/4ths mark!
* Brake Controller – A switch designed to make sure your trailer brakes when your car does.
* Breakaway Switch – A switch in your trailer that, if disconnected, will engage the trailer brakes. It needs a 12-volt power source to work, though,
* Bumper Pull – Slang for a travel trailer.
* Cargo Carrying Capacity (CCC) – How much weight you can put on your RV.
* Class A or Type A motor home – The largest type of motorhome, what you think of when you think “Winnebago”.
* Class B or Type B motor home – Smaller than a Type A, about 20 feet.
* Class C or Type C motor home – Generally built on a van, and about 20 to 30 feet.
* Converter – Turns AC power to DC power, very useful for your RV.
* Coupler- What attaches your trailer to your car’s hitch.
* Deep Cycle Battery – Also called a “house” battery or “auxiliary” battery, it supplies 12-volt DC power to the appliances and accessories in the RV. It’s designed to be charged up while your motor home is running, but it’s different from a car battery since it’s designed to be recharged repeatedly and hold charge for longer.
* Delamination – When a fiberglass panel starts peeling off the RV, usually because of water damage.
* Demand Water Pump – The water pump that keeps your water system pressurized.
* Diesel Pusher – Also called a “pusher”, this is an RV with a diesel engine in the back.
* Dinghy – Slang for what you’re towing behind your RV.
* Dry Camping – When you go camping without any hookups.
* Dry Weight – The RV’s weight when it rolls off the line.
* DSI- Direct Spark Ignition (DSI) – touch-button system for igniting a propane burner, often used in motorhomes.
* Ducted A/C and Heat – A system for air conditioning in an RV; the cool air goes through the ceiling and the heat through the bottom.
* Dually – A truck with two tires for each side of the axle.
* Dump outlet – Where you empty out your sewage and waste water on your RV
* Dump Station – A place to dump sewage at a campsite.
* Equalizing Hitch – A hitch that distributes some of the weight across your trailer as well as your towing vehicle, usually 10 to 15 percent.
* Fifth Wheel Trailer – A trailer with a raised front that extends over the bed of a pickup truck. There a special hitch in the truck bed to attach it. Also called a “fiver”.
* Filon – Fiberglass sheeting used in RVs.
* Folding Camping Trailer – AKA a tent trailer or a pop-up.
* Fresh Water Fill – Where you load fresh water into your RV.
* Full-Timers / Full-Timing – Slang for people who live in their motor homes year-round.
* Genset – Short for generator set.
* Gray Water Holding Tank – Collects sink and shower water for later disposal.
* Gross Axle Weight Rating (GAWR) – The most weight an axle on a vehicle is allowed to support.
* Gross Combined Weight Rating (GCWR) – The most weight allowed for a tow vehicle and trailer together.
* Gross Vehicle Weight Rating (GVWR) – the most weight when the trailer is fully loaded for travel.
* Gross Vehicle Weight or Gross Trailer Weight (GVW) – The actual weight of your tow vehicle and trailer.
* Hitch Receiver- Where you connect your RV to your tow vehicle.
* Hitch Weight – How much weight is directly on the hitch.
* Inverter – Converts 12vDC to 12vAC for use with appliances.
* Kilowatts – How much power a generator puts out. 1000 watts equals a kilowatt.
* LP Gas – Liquid petroleum or propane, used for cooking and heat and stored in tanks.
* Monitor Panel – Lets you see how full your water tanks are and also the status of your house battery.
* OEM – Original Equipment Manufacturer
* Park Model – A trailer designed to be set up permanently somewhere.
* Porpoising – Used to describe the movement of an RV while traveling; it goes up and down, like a dolphin swimming.
* Pull Through Site – A campground where you don’t have to back up.
* R Refer – Abbreviation for “RV refrigerator”.
* Regulator- Gas controls for your appliances.
* Rig – Slang for your RV.
* RV – Short for “recreational vehicle”.
* RVDA – Recreation Vehicle Dealers Association
* RVIA – Recreation Vehicle Industry Association
* Safety Chains – Chains connected between the trailer and the tow vehicle so if the hitch breaks, the trailer won’t be a hazard.
* Screen Room – Think of this as your RV’s screen porch; it pops out for you.
* Sewer hose donut – A plastic or rubber ring to get a good seal on your sewer hose. Required at most campgrounds, for obvious reasons.
* Shore Power – Slang for plugging into an external 120vAC connection at a campground.
* Slide-In – A truck camper that slides in to the bed of a pickup truck.
* Slide-Out – A section that comes out to give you more space.
* Slider Hitch – A special hitch used for fifth-wheel trailers, to keep the trailer from bumping into the truck’s cab.
* Snowbird – RVs who travel south for the warmer winters.
* Stick and Tin – An RV with a wood frame and an aluminum interior.
* Surge Brakes – A system on the trailer that acts when it sense the RV slowing down.
* Sway Control- used to prevent the trailer from swinging around wildly. Comes in several types, such as friction sway control.
* Tag Axle – An axle that’s not a drive, used to support some of the RV’s weight.
* Three Way Refrigerator – a refrigerator that can work on 12vAC, 12vDC, or LP gas.
* Toad – See dinghy.
* Tongue Jack – The jack mounted on the the trailer that supports the front. Used to raise or lower the trailer during hitching.
* Tongue Weight – the weight pressing on the trailer’s hitch when fully loaded.
* Tote tank – A tank to fill and haul to a dump station if you can’t get close enough, designed to be portable.
* Toy Hauler – An RV that has a ramp for you to load in motorcycles and other expensive toys.
* Transmission Oil Cooler – A small heat exchanger or radiator designed to keep your transmission cool and prevent overheating.
* Travel Trailer – An RV that you tow.
* Truck Camper – Campers placed on the bed of a pickup truck. Very good with off-roading.
* TT – Short for travel trailer.
* TV – Short for tow vehicle.
* Water Pressure Regulator – Protects your plumbing system against overpressurization.
* Wheelbase – The distance between the centers of the primary axles.
* Wide Body – An RV that is wider than 8’, the standard width. Generally a wide-body is 8”6’.

Refer capacity..... How much beer you can fit in your fridge...