Reptile Terrarium Glossary: 22 Terms Explained
The words that show up in reptile terrarium specs, reviews and how-to guides, explained without jargon. Open any term for the full explanation and what to look for when buying.
- Arboreal
- Describes tree-dwelling species that spend most of their time climbing, needing tall enclosures with branches rather than floor space.
- Read more about arborealRelated: Best Tall Arboreal Enclosures for Climbing Species
- Basking spot
- The warmest point in an enclosure, directly under a heat bulb, warmed to the specific temperature a species needs to digest and regulate.
- Read more about basking spotRelated: Best Basking Bulbs for Reptile Heat Gradients
- Bioactive enclosure
- A living setup with soil, plants, and a cleanup crew of springtails and isopods that break down waste so the substrate rarely needs replacing.
- Read more about bioactive enclosureRelated: Best Bioactive Soil Mixes for Terrariums
- Brumation
- A slowed, cold-season version of hibernation some reptile species go through, best discussed with an exotics vet before attempting.
- Read more about brumation
- Calcium dusting
- Coating feeder insects with calcium supplement before feeding to prevent metabolic bone disease in insect-eating reptiles.
- Read more about calcium dustingRelated: Best Calcium and Supplements for Reptiles
- Ceramic heat emitter
- A screw-in heat source that produces infrared warmth with no visible light, most often used to hold night temperatures without disturbing sleep.
- Read more about ceramic heat emitterRelated: Best Ceramic Heat Emitters for Night and Ambient Heat
- Cleanup crew
- Springtails, isopods, or both, added to a bioactive enclosure to break down waste so substrate rarely needs full replacement.
- Read more about cleanup crew
- Deep heat projector
- A heat bulb that emits infrared wavelengths deep enough to warm an animal's core, similar to how natural sunlight radiates heat.
- Read more about deep heat projectorRelated: Best Deep Heat Projectors for Terrariums
- Drainage layer
- A layer of clay balls or coarse material at the bottom of a bioactive enclosure that keeps excess water from waterlogging the soil above it.
- Read more about drainage layer
- Dysecdysis
- Incomplete shedding that leaves old skin stuck on the body, often at the toes or tail tip, usually linked to low humidity.
- Read more about dysecdysis
- Humidity gradient
- A difference in moisture level across an enclosure, similar to a thermal gradient, giving an animal both humid and drier areas to choose from.
- Read more about humidity gradient
- Hygrometer
- A gauge that measures humidity inside an enclosure, with digital probe models giving far more accurate readings than analog dial gauges.
- Read more about hygrometerRelated: Best Reptile Thermometers and Hygrometers
- Metabolic bone disease
- A weakening of the skeleton caused by long-term calcium or vitamin D3 deficiency, most often from missing UVB or inconsistent dusting.
- Read more about metabolic bone disease
- Photoperiod
- The daily cycle of light and dark hours an enclosure follows, usually set with a timer to mimic natural seasonal daylight.
- Read more about photoperiod
- Quarantine
- Keeping a new animal separate for weeks to watch for illness before it has any contact with animals already in the household.
- Read more about quarantineRelated: Best Quarantine Tubs for New Reptiles and Amphibians
- Substrate
- The material lining the floor of an enclosure, chosen by species needs such as burrowing, humidity retention, or ease of spot cleaning.
- Read more about substrate
- Terrestrial
- Describes ground-dwelling reptiles that spend nearly all their time on the enclosure floor, where floor space matters more than height.
- Read more about terrestrial
- Thermal gradient
- A temperature difference between the warm and cool ends of a reptile enclosure that lets an animal choose its own comfortable spot.
- Read more about thermal gradient
- Thermostat
- A controller wired between a heat source and its outlet that shuts off or lowers power once a set temperature is reached.
- Read more about thermostatRelated: Best Thermostats for Reptiles
- Under-tank heater
- A thin heating pad placed beneath or on the side of an enclosure to warm the floor or a hide, always used with a thermostat.
- Read more about under-tank heater
- UV index
- A measurement of UVB strength at an animal's basking position, read with a meter and compared against a target range for the species.
- Read more about uv indexRelated: Best UV Index Meters for Checking Reptile Lighting
- UVB
- Ultraviolet light many reptiles need to make vitamin D3 and absorb calcium. Bulbs weaken with time and need regular replacement.
- Read more about uvbRelated: Best UVB Bulbs for Reptile Enclosures