The word which comes on the basis of new words through prefixes and suffixes is known as word root. A maximum number of these root words are derived from either Greek or Latin words. From these root words, we can understand the meaning of new words, which are important for biology. Some of the common root words which are commonly used in Biology are hypo-,  Macro-, -cide, -phil, Ab-, Abs-, Poly-, Geno-, Hypo-, Aqua-, Dis-, Bi-, Di-, -meter, -phobia, Bio-, Epi-, Eu-, Ex, Hetero-, Homo-, Inter-, Iso-, Locus, Micro-, Mono-, Ped-, Pod, Pro-, A-, An-, Allo-, Cyt, Endo-, Olig-, Phago-, Stom-, Zoo-, Zygo-. 

List of Root Words Starting With Bi (Bi Words)

Below mentioned are some of the bi words:


This term is used to describe two flagella i.e. a thread-like structure that helps in the locomotion process. It is mainly found in unicellular organisms. Flagella are microscopic hair-like structures that help a cell move around. The word "flagellum" literally means "whip." Flagella have quite a whip-like look and aid in propelling a cell via liquid.


Bipedalism is a type of terrestrial locomotion in which an organism uses its two rear legs or limbs to travel. A biped (indicating "two feet") is an animal that normally moves in a bipedal fashion (from the Latin bis representing "double" and pes representing "foot"). Walking, running, and jumping are examples of bipedal movement.

Few human species are bipeds that walk on two legs as their primary mode of locomotion. Habitual bipedalism has developed several times within mammals, with macropods, mice and kangaroo rats, springhare, jumping mice, pangolins, and hominin apes (australopithecines and humans) and several other extinct groups developing the trait individually. Most archosaurs (which comprises crocodiles and dinosaurs) evolved bipedalism during the Triassic period; amongst dinosaurs, most early forms and several later classes became regular or exclusive bipeds; and birds are representatives of the theropods, a clade of primarily bipedal dinosaurs.


They are the class of organisms that mainly belong to the phylum Mollusca. The similar term “Bivalvia” was used by Linnaeus in 1758, and this term is used for animals having shells composed of two shells. 

Bivalvia, also known as Lamellibranchiata and Pelecypoda in past eras, is a group of marine and freshwater mollusks with laterally compressed bodies and a shell made up of two hinged parts. Bivalves are mollusks that exclude a head and maybe some typical molluscan organs including the radula and odontophore. Clams, cockles, oysters, mussels, scallops, and a variety of several other families living in saltwater, as well as a few families that live in freshwater, are among them. Filter feeders make up the rest of the population. The gills also developed into ctenidia, which are specialised food and breathing organs. The majority of bivalves burrow into sediment, where they are comparatively secured from predators.


It is the state which is derived from two ova along with that “binovular twins” are also used to express the same state. 


This term tells us about the condition of an organism that is capable of producing both male and female gametes. In some multicellular organisms, bisexuality is called a hermaphrodite, like in earthworm. 

Bisexuality, along with heterosexuality and homosexuality, is one of the three major classifications of sexual identity that exist on the heterosexual–homosexual spectrum. A bisexual orientation does not always imply equal sexual attraction to both sexes; many individuals who label as bisexual do have a prominent but not exclusive sexual preference for one sex over another. Throughout known history, bisexuality has also been found in different human cultures and throughout the animal kingdom. However, like the concepts of heterosexuality and homosexuality, bisexuality was invented in the nineteenth century.


Organisms that perform two functions are called bifunctional in nature. 


A biennial plant is a flowering plant that has a biological life cycle of two years. The plant's stems, leaves, and roots (vegetative structures) evolve during primary growth during the first year. The plant's stem is usually kept short, and the leaves are kept low to the bottom, creating a rosette.

The plant begins a time of dormancy for the winter months after the first year. Most biennials need vernalization (cold therapy) before flowering. The biennial plant's stem lengthens tremendously, or "bolts," the following spring or summer. After that, the plant blooms, generating fruits and seeds before dying. Biennials may not always have a strict two-year cycle time, and most wild plants may take three or more years to get fully matured. The size of a rosette leaf has been conducted to examine when a plant will flower and produce seeds in its second stage. A biennial plant, on the other hand, can complete its life cycle quickly in severe climatic conditions.


Bicuspid aortic valve (BAV) is an inherited heart condition wherein the two of the aortic valve's leaflets merge while foetal development, leading to a two-leaflet valve (bicuspid valve) rather than the usual three-leaflet valve (tricuspid). BAV is perhaps the most major condition of congenital heart disease, affecting about 1.3 percent of adults. 

The mitral valve, which is located between both the heart's left atrium and left ventricle, is usually just one bicuspid valve. The unidirectional blood flow from the atrium to the ventricles, or even from the ventricle to the aorta or pulmonary trunk, is ensured by heart valves.

There are three possible configurations for bicuspid aortic valves:

  • Bicuspid valves with two symmetric leaflets that are "real."

  • A tricuspid architecture with two leaflets fused together.

  • A tricuspid architecture with three leaflets fused together.

FAQs (Frequently Asked Questions)

Q1. What is the Bi Full Form?

Ans. 'Bi' (bi full form) is a root word that means 'two.' It's a Latin word with a Latin root. Di, a Greek root word, is another root that means two. As a result, a bicycle is a vehicle that moves on two wheels. The bi root word is widely used for a number of calendar-related events.

Q2. What are the Benefits and Drawbacks of Bipedalism?

Ans. Bipedalism has the benefit of enabling you to stand higher and see further. Raising children often provides the benefit of bipedalism, since a baby can be borne as you run. The downside is that future predators would be able to see them and attack.