Anagrams of: ORBITPERIOD

• A geographical area that has a uniform biological environment and a uniform distribution of plants and animals

• A context where someone feels 'naturally' at home, such as their field of professional or scientific expertise

• an inquiry into unfamiliar or questionable activities

• a flexible slender surgical instrument with a blunt end that is used to explore wounds or body cavities

• an exploratory action or expedition

• an investigation conducted using a flexible surgical instrument to explore an injury or a body cavity

• question or examine thoroughly and closely

• examine physically with or as if with a probe

• Of birds: sitting persistently and protectively on a nest, in order to hatch eggs.

• Of any creature or person: showing an interest in raising young.

• hanging down (as from exhaustion or weakness)

• a professional killer who uses a gun

• a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

• an explosive device that is set off in an oil well (or a gas well) to start or to increase the flow of oil (or gas)

• a small firework that consists of a percussion cap and some gravel wrapped in paper; explodes when thrown forcefully against a hard surface

• a small explosive device that is placed on a railroad track and fires when a train runs over it; the sound of the explosion warns the engineer of danger ahead

• armament consisting of a long cylindrical self-propelled underwater projectile that detonates on contact with a target

• any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges

• attack or hit with torpedoes

• having two feet

• an animal with two feet

• a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current

• a strong surface current flowing outwards from a shore

• apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants

• a pale green variety of chrysolite; used as a gemstone