dyad /DĪ-ad/ n. A replicated chromosome — a pair of sister chromatids. diotic /dÄ«-AWT-ick/ adj. diplotene /DIP-lō-teen/ n. A stage of meiotic prophase. Unlike ordinary fish scales, denticles have a structure similar to that of real teeth (i.e., an internal pulp cavity surrounded by dentin with an enamel-like coat of vitrodentine). Having two hydrogen atoms that can be replaced by basic radicals. decimorgan /DES-ə-MORE-gən/ See: Morgan unit. dormant /DORE-mənt/ adj. Check Such modifications can alter gene expression patterns in cells and can be inherited through cell division. diethylaminoethyl cellulose (DEAE or DEAE-C) A resin used in diffusion purification and separation. dendrochronology /den-drō-krə-NAWL-ə-jee/ n. The use of tree growth rings to date environmental events. denticles /DENT-ə-kəls/ n. Small, sharp, toothlike scales found on sharks, rays and chimaeras. One of them fuses with the female gamete, or egg cell, which after fertilization goes on to develop into the embryo. PICTURE | GEOGRAPHIC RANGE, duodenum /doo-AWD-ə-nəm/ n. The upper, short (~25 cm) portion of the small intestine. ... bi-, di-Ex: Bi noculars, Di … deciduous /də-SID-joo-əs/ adj. dilatant /Ä«-LAY-tənt/ n. Something that causes dilation. dalton (Da) n. A unit of mass (also known as an atomic mass unit, amu), equal to the mass of a hydrogen atom (1.67 x 1024 g). double circulatory system A blood circulation in which the pulmonary circulation is separate from the systemic circulation (as in mammals, birds, and crocodilians). desiccation /deh-sick-KAY-shən/ n. A process of drying; in an organism: moisture loss. Similar to how biology students perform a live or virtual dissection on a fetal pig, using suffixes and prefixes to 'dissect' unfamiliar words is a key component to having success in the biological sciences. It connects the pylorus with the jejunum. deaminization /də-am-in-eye-ZAY-shən, dee-/ n. Chemical decomposition in which a compound such as an amino acid or alkaloid loses its amino group and forms ammonia. – a life story written by another person;. dropsy /DRAWP-see/ n. An archaic term for swelling of soft tissue caused by accumulation of water. Scientific Root Words, Prefixes, And Suffixes a-, an- not, without, lacking, deficient ab- away from, out from -able capable of ac- to, toward -aceous of or pertaining to acou-, acous- hear ad- to, toward aden- gland adip- fat aero- air agri- field, soil -al having the character of alb- white alg-, -algia pain alto- … When measured in grams, it is equal to the reciprocal of Avagadro's number. Bioinformatics. diaphragm /DĪ-ə-fram/ n. (1) any thin membrane; (2) A muscular wall separating the abdomen from the thoracic cavity; it contracts with each breath (inspiration) and relaxes with each exhalation (expiration). ", DNA polymerase /pə-LIM-er-aze/ n. An enzyme that catalyzes the synthesis of a complementary strand of DNA on a single-stranded DNA template. 179 words relating to Biology Total Cards. Compare: systole. diffusion /də-FYOO-shən, diff-/ n. The tendency of a substance to move in the direction toward which it is less concentrated. Having discoid feet. Toothed, having teeth. dimethyl sulfoxide (DMSO) A colorless liquid that dissolves both polar and nonpolar compounds. deciliter /DES-ə-LEET-er/ n. One-tenth of a liter. dentary /DENT-er-ee/ n. One of the pair of bones present in the lower jaw of most vertebrates. Biology introduces you to many new words. desiccated /DEH-sick-kate-əd/ adj. The other fuses with the two polar nuclei to form the endosperm. dibasic /dÄ«-BASE-ick/ adj. Activities Biology Crossword Puzzle Biology Word Search Back to science. diplophase /DIP-lō-faze/ n. The phase in the life cycle of a diploid organism, which begins with the formation of the zygote and ends with meiosis. depilate /DEP-ə-late/ v. To remove hair. defective virus A virus that can reproduce only in the presence of another, so-called helper virus, that carries the genes necessary for the replication of the defective virus. MAP. relating to, at - nocturnal, diurnal, arboreal, terrestrial, b…. dimethylformamide (DMF) /DĪ-meth-əl-FORM-ə-mÄ«d/ A common solvent; a colorless liquid, miscible with water and most organic liquids. Meaning: drill instructor. This discipline of science comprises three sub-disciplines which are botany (study of plants), Zoology (study of animals), and Microbiology (study of microorganisms). divergent evolution (also divergence) /də-VERJ-ənt, dÄ«-/ adj. /DEH-form-MAY-shən/. dissect /də-SECT or DĪ-sect/ v. To cut apart an organism so as to reveal its separate parts and their connections. dichroic /d-KRŌ-ick/ (also dichromatic /dÄ«-krō-MAT-ick/) adj. In a dried state. Click here to open a Word document upon which to write your answers. biome- a complex biotic community characterized by distinctive plant and animal species and maintained under the climatic conditions of the region, especially such a community that has developed to climax. dormancy /DORE-mən-see/ n. A period of interrupted growth and metabolic inactivity. 2. These prefixes and suffixes also can help you understand what the people in biology subspecialties do. dimer /DĪ-mer/ n. A chemical compound composed of two simpler molecules; a polymer composed of two monomers — dimerism /DĪ-mer-iz-əm/. dermal tissue system (also epidermis) /ep-ə-DERM-əs/ A layer protecting the young parts of a plant; it is one cell thick. We will start with list #1 and continue until we finish. duct /dəkt/ n. Within the body, any narrow tube conveying or enclosing fluids. dzo (or zho or dzoyo or khainag) n. A hybrid between yak (Bos grunniens) and zebu cattle (Bos indicus). daughter cells The cells produced by division of a single parent cell. discoplacental /DISK-ō-plə-SENT-əl/ adj. Commonly used as a reagent for methylation of amines, phenols, and thiols. A word list of science vocabulary—from astrophysics to zoology! disease /də-ZEEZ, dih-/ n. A condition of a living organism that in some way impairs its function; a pathological condition; sickness. deoxyriboside /dee-AWKS-ee-RĪ-bō-side/ See: nucleoside. Biology Dictionary (DIPLO-) diploblastic /DIP-lō-BLAST-ik/ adj. Denaturation makes a protein lose its functionality. It is itself miscible in many organic solvents, and in water. disaccharides (also disaccharoses) n. A group name for complex sugars composed of two bonded monosaccharides. 1. twice; two; double: dicotyledon. Compare: levoversion. This actually occurs during DNA replication. 26-letter words that start with di. demoid /DEM-oid/ adj. For the quiz, you will be expected to write down the definition of the prefix/suffix, give an example of a word that uses it, and define the word. deliquesce /del-lə-KWESS/ v. To liquify. biosphere – Earth’s surface inhabited by living things: cand: glowing, iridescent PICTURE. MORE INFORMATION. Click here to study/print these flashcards. However, most English teachers will tell you that mastering the 3000 most common words in English will give you 90 to 95% comprehension of English newspapers, books, movies, and conversations. English has a large vocabulary with an estimated 250,000 distinct words and three times that many distinct meanings of words. Put those two words together and you get the "study of life." di methylphenylpiperazinium. The following 200 pages are in this category, out of 832 total. d (1) dalton unit; (2) distal; (3) dorsal. Homework Animals Math History Biography Money and Finance Biography Artists discodactylous /DISK-ō-DAK-təl-əs/ adj. dihybrid cross /dÄ«-HĪ-brid/ A mating in which the parents differ with respect to two genetically determined traits.