bi-, bin-, bino-, bis-

(Latin: two, twice, double, twofold; a number; it normally functions as a prefix)

This bi- is used before s, c, or a vowel. Don't confuse this bi- with another one which means "life".

All words except biennial referring to periods of time and prefixed by bi- are potentially ambiguous. Since bi- can be taken to mean either "twice each" or "every two", a word like "biweekly" can be understood as "twice each week" or "every two weeks".

bitemporal hemianopia
Blindness in the temporal half of the visual field in each eye.

The temporal halves are located on each side of the head, back of the eyes and forehead, above the zygomatic arch and in front of the ears.

bitentacle (s) (adjective) (not comparable)
Descriptive of any creature that has two long, thin, armlike parts: While researching zoological species in the sea, Brian noticed that there were some bitentacle animals in addition to the octopi (eight-tentacle animals) and squids (ten-tentacle animals).

One example of a bitentacle creature is the cuttlefish that has eight arms and two tentacles that have toothless suckers with which they grab and hold their prey.

bitheism (s) (noun), bitheisms (pl)
The belief that the world is ruled by two equal and opposing forces or gods, one good and one evil.
bivalve (s) (noun), bivalves (pl)
1. Consisting of two plates; such as, the shells of bilaterally symmetrical molluscs which are laterally flattened and have shells made of two hinges: "Some examples of bivalves include clams, oysters, mussels, scallops, and cockles which are characterized by laterally flattened bodies and shells that consist of two hinged parts."

"Their enlarged gils are covered with cilia (fine hairs) and they have the additional functions of filtering microscopic food particles from the water as it flows over them."

"Bibalves life on the bottom of the sea or lakes and are sedentary or not moving around."

valva, "section of a folding or revolving door"; literally, "that which turns"; related to volvere "to roll".

The meaning was extended in about 1659 to "a mechanical device that works like a valve"; and in 1661 in zoology to "halves of a hinged shell".

An oyster is a bivalve because it has a two-valved shell.

bivalvular (adjective), more bivalvular, most bivalvular
Pertaining to an animal that has a soft body with no bones which is usually covered by a hard shell; as well as some seeds of certain plants: "The bivalvular creatures have two shells and they consume small particles from the water by filtering them."

"Oysters and mussels, permanently attach themselves to hard surfaces as adults and the foot is sedge-shaped and is used for digging in the sand or mud where they secrete tough attachment threads."

A name composed of two words.
Relating to two words; punning.
1. The act of combining or the state of being combined.
2. The result of combining.
3. An alliance of people or parties for a common purpose; an association.
4. A sequence of numbers or letters used to open a combination lock.
5. In mathematics, one or more elements selected from a set without regard to the order of selection.
1. Relating to or involving combinations.
2. Marked by or relating to or resulting from combination.
3. Able to or tending to combine.
combine (verb), combines; combined; combining
1. To be joined or mixed together, or to join or to mix people or things together.
2. To undertake two or more activities at the same time: Hank's mother has successfully combined a career as an medical doctor and as a hospital executive.
3. To join together, or to make substances join together, to form a chemical compound.
4. Etymology: from about 1440, from Medieval French combiner, from Late Latin combinare, "to unite, to yoke together"; from Latin com-, "together" + bini, "two by two", from bi-, "twice".