| biochemist | (noun) someone with special training in biochemistry | - |
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| biochemistry | (noun) the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry | - |
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| biochip | (noun) a microchip that uses tiny strands of DNA to latch onto and quickly recognize thousands of genes at a time; intended for use in a biological environment | - |
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| bioclimatic | (adjective) of or concerned with the relations of climate and living organisms | - |
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| bioclimatology | (noun) the study of effects of climate on living organisms | - |
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| biodefence | (noun) procedures involved in taking defensive measures against attacks using biological agents | Synonyms: biodefense, biological defence, biological defense |
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| biodefense | (noun) procedures involved in taking defensive measures against attacks using biological agents | Synonyms: biodefence, biological defence, biological defense |
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| biodegradable | (adjective) capable of being decomposed by e.g. bacteria | - |
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| biodegrade | (verb) break down naturally through the action of biological agents | - |
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| biodiversity | (noun) the diversity of plant and animal life in a particular habitat (or in the world as a whole) | - |
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| biodynamics | (noun) the branch of biology dealing with energy or the activity of living organisms. | - |
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| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| bioengineering | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: biotechnology, ergonomics |
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| bioethics | (noun) the branch of ethics that studies moral values in the biomedical sciences | - |
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| biofeedback | (noun) a training program in which a person is given information about physiological processes (heart rate or blood pressure) that is not normally available with the goal of gaining conscious control of them | - |
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| bioflavinoid | (noun) a vitamin that maintains the resistance of cell and capillary walls to permeation | Synonyms: citrin, vitamin P |
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| biogenesis | (noun) the production of living organisms from other living organisms | Synonyms: biogeny |
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| (noun) production of a chemical compound by a living organism | Synonyms: biosynthesis |
| biogenetic | (adjective) of or relating to the production of living organisms from other living organisms | - |
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| biogenic | (adjective) produced by living organisms or biological processes | - |
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| (adjective) essential for maintaining the fundamental life processes | - |
| biogenous | (adjective) producing or produced by living things | - |
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| biogeny | (noun) the production of living organisms from other living organisms | Synonyms: biogenesis |
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| biogeographic | (adjective) of or relating to or involved with biogeography | Synonyms: biogeographical |
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| biogeographical | (adjective) of or relating to or involved with biogeography | Synonyms: biogeographic |
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| biogeography | (noun) dealing with the geographical distribution of animals and plants | - |
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| biographer | (noun) someone who writes an account of a person's life | - |
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| biographic | (adjective) of or relating to or being biography | Synonyms: biographical |
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| biographical | (adjective) of or relating to or being biography | Synonyms: biographic |
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| biographism | (noun) reduction of textual meaning to authorial biography. | - |
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| biography | (noun) an account of the series of events making up a person's life | Synonyms: life, life history, life story |
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| biohazard | (noun) any bacterium or virus or toxin that could be used in biological warfare | Synonyms: biological agent |
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| (noun) hazard to humans or the environment resulting from biological agents or conditions | - |
| biologic | (adjective) pertaining to biology or to life and living things | Synonyms: biological |
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| biological | (adjective) (of a parent or child) related by blood; genetically related | Synonyms: natural |
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| (adjective) pertaining to biology or to life and living things | Synonyms: biologic |
| biologically | (adverb) with respect to biology | - |
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| biologism | (noun) use of biological principles in explaining human especially social behavior | - |
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| biologist | (noun) (biology) a scientist who studies living organisms | Synonyms: life scientist |
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| biologistic | (adjective) of or relating to biologism | - |
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| biology | (noun) the science that studies living organisms | Synonyms: biological science |
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| (noun) all the plant and animal life of a particular region | Synonyms: biota |
| (noun) characteristic life processes and phenomena of living organisms | - |
| bioluminescence | (noun) luminescence produced by physiological processes (as in the firefly) | - |
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| bioluminescent | (adjective) (of living organisms) emitting light | - |
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| biomass | (noun) the total mass of living matter in a given unit area | - |
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| (noun) plant materials and animal waste used as fuel | - |
| biome | (noun) a major biotic community characterized by the dominant forms of plant life and the prevailing climate | - |
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| biomedical | (adjective) relating to the activities and applications of science to clinical medicine | - |
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| biomedicine | (noun) the branch of medical science that studies the ability of organisms to withstand environmental stress (as in space travel) | - |
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| (noun) the branch of medical science that applies biological and physiological principles to clinical practice | - |
| biometrics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometry, biostatistics |
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| biometry | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometrics, biostatistics |
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| bionic | (adjective) of or relating to bionics | - |
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| (adjective) having particular physiological functions augmented or replaced by electronic or electromechanical components | - |
| bionics | (noun) application of biological principles to the study and design of engineering systems (especially electronic systems) | - |
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| bionomic | (adjective) of or relating to the science of ecology | Synonyms: bionomical, ecologic, ecological |
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| bionomical | (adjective) of or relating to the science of ecology | Synonyms: bionomic, ecologic, ecological |
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| bionomics | (noun) the branch of biology concerned with the relations between organisms and their environment | Synonyms: ecology, environmental science |
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| biont | (noun) a discrete unit of living matter | - |
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| biophysicist | (noun) a physicist who applies the methods of physics to biology | - |
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| biophysics | (noun) physics as applied to biological problems | - |
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| biopiracy | (noun) biological theft; illegal collection of indigenous plants by corporations who patent them for their own use | - |
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| biopsy | (noun) examination of tissues or liquids from the living body to determine the existence or cause of a disease | - |
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| bioremediation | (noun) the act of treating waste or pollutants by the use of microorganisms (as bacteria) that can break down the undesirable substances | - |
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| (noun) the branch of biotechnology that uses biological process to overcome environmental problems | - |
| biosafety | (noun) safety from exposure to infectious agents | - |
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| bioscience | (noun) any of the branches of natural science dealing with the structure and behavior of living organisms | Synonyms: life science |
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| bioscope | (noun) a kind of early movie projector | - |
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| (noun) a South African movie theater | - |
| biosphere | (noun) the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist | - |
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| biostatistics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometrics, biometry |
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| biosynthesis | (noun) production of a chemical compound by a living organism | Synonyms: biogenesis |
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| biosynthetic | (adjective) of or relating to biosynthesis | - |
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| biosystematic | (adjective) of or relating to biosystematics | - |
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| biosystematics | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematy |
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| biosystematy | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematics |
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| biota | (noun) all the plant and animal life of a particular region | Synonyms: biology |
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| biotech | (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotechnology |
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| biotechnology | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: bioengineering, ergonomics |
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| (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotech |
| bioterrorism | (noun) terrorism using the weapons of biological warfare | Synonyms: biological terrorism |
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| biotic | (adjective) of or relating to living organisms | - |
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| biotin | (noun) a B vitamin that aids in body growth | Synonyms: vitamin H |
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| biotite | (noun) dark brown to black mica found in igneous and metamorphic rock | - |
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| biotitic | (adjective) relating to or involving biotite | - |
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| biotype | (noun) organisms sharing a specified genotype or the genotype (or peculiarities) so shared | - |
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| biotypic | (adjective) of or relating to a biotype | - |
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| biovular | (adjective) (of twins) derived from two separate fertilized ova | Synonyms: fraternal |
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| bioweapon | (noun) any weapon usable in biological warfare | Synonyms: bioarm, biological weapon |
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| biparous | (adjective) producing two offspring at a time | Synonyms: twinning |
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| bipartisan | (adjective) supported by both sides | Synonyms: bipartizan, two-party, two-way |
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| bipartite | (adjective) divided into two portions almost to the base | - |
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| (adjective) involving two parts or elements | Synonyms: two-part, two-way |
| bipartizan | (adjective) supported by both sides | Synonyms: bipartisan, two-party, two-way |
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| biped | (adjective) having two feet | Synonyms: bipedal, two-footed |
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| (noun) an animal with two feet | - |
| bipedal | (adjective) having two feet | Synonyms: biped, two-footed |
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| bipedalism | (noun) the bodily attribute of being bipedal; having two feet | - |
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| bipinnate | (adjective) of a leaf shape; having doubly pinnate leaflets (as ferns) | - |
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| bipinnatifid | (adjective) pinnatifid with the segments also pinnatifid | - |
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| biplane | (noun) old fashioned airplane; has two wings one above the other | - |
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| bipolar | (adjective) having two poles | - |
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| (adjective) of, pertaining to, or occurring in both polar regions | - |
| (adjective) of or relating to manic depressive illness | - |
| biprism | (noun) an optical device for obtaining interference fringes | - |
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| biquadrate | (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadratic, fourth power, quartic |
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| biquadratic | (adjective) involving the fourth and no higher power of a quantity or degree | - |
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| (noun) a polynomial of the fourth degree | Synonyms: biquadratic polynomial, quartic polynomial |
| (noun) an equation of the fourth degree | Synonyms: biquadratic equation |
| (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadrate, fourth power, quartic |
| biracial | (adjective) consisting of or combining two races | - |
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| biradial | (adjective) showing both bilateral and radial symmetry | - |
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| biradially | (adverb) in a biradial manner | - |
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| biramous | (adjective) resembling a fork; divided or separated into two branches | Synonyms: bifurcate, branched, forficate, fork-like, forked, pronged, prongy |
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| birch | (adjective) consisting of or made of wood of the birch tree | Synonyms: birchen, birken |
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| (noun) a switch consisting of a twig or a bundle of twigs from a birch tree; used to hit people as punishment | Synonyms: birch rod |
| (noun) any betulaceous tree or shrub of the genus Betula having a thin peeling bark | Synonyms: birch tree |
| (noun) hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood | - |
| (verb) whip with a birch twig | - |
| birchbark | (noun) a canoe made with the bark of a birch tree | Synonyms: birch bark, birchbark canoe |
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| birchen | (adjective) consisting of or made of wood of the birch tree | Synonyms: birch, birken |
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| bird | (noun) warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings | - |
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| (noun) badminton equipment consisting of a ball of cork or rubber with a crown of feathers | Synonyms: birdie, shuttle, shuttlecock |
| (noun) a cry or noise made to express displeasure or contempt | Synonyms: boo, Bronx cheer, hiss, hoot, raspberry, razz, razzing, snort |
| (noun) the flesh of a bird or fowl (wild or domestic) used as food | Synonyms: fowl |
| (noun) informal terms for a (young) woman | Synonyms: chick, dame, doll, skirt, wench |
| (verb) watch and study birds in their natural habitat | Synonyms: birdwatch |