Science, Tech, Math › Science Biology Prefixes and Suffixes: diplo- Share Flipboard Email Print Conceptual visualization of the diplococcus bacterium gonorrhea (Neisseria gonorrhoeae) that causes the sexually transmitted disease gonorrhea. Credit: Science Picture Co/Subjects/Getty Images Science Biology Basics Cell Biology Genetics Organisms Anatomy Physiology Botany Ecology Chemistry Physics Geology Astronomy Weather & Climate By Regina Bailey Biology Expert B.A., Biology, Emory University A.S., Nursing, Chattahoochee Technical College Regina Bailey is a board-certified registered nurse, science writer and educator. Her work has been featured in "Kaplan AP Biology" and "The Internet for Cellular and Molecular Biologists." our editorial process Regina Bailey Updated February 20, 2018 The prefix (diplo-) means double, twice as many or twice as much. It is derived from the Greek diploos meaning double. Words Beginning With: (Diplo-) Diplobacilli (diplo-bacilli): This is the name given to rod-shaped bacteria that remain in pairs following cell division. They divide by binary fission and are joined end to end. Diplobacteria (diplo-bacteria): Diplobacteria is the general term for bacteria cells that are joined in pairs. Diplobiont (diplo-biont): A diplobiont is an organism, such as a plant or fungus, that has both haploid and diploid generations in its life cyle. Diploblastic (diplo-blastic): This term refers to organisms that have body tissues that are derived from two germ layers: the endoderm and ectoderm. Examples include cnidarians: jellyfish, sea anemones, and hydras. Diplocardia (diplo-cardia): Diplocardia is a condition in which the right and left halves of the heart are separated by a fissure or groove. Diplocardiac (diplo-cardiac): Mammals and birds are examples of diplocardiac organisms. They have two separate circulatory pathways for blood: pulmonary and systemic circuits. Diplocephalus (diplo-cephalus): Diplocephalus is a condition in which a fetus or conjoined twins develop two heads. Diplochory (diplo-chory): Diplochory is a method by which plants disperse seeds. This method involves two or more distinct mechanisms. Diplococcemia (diplo-cocc-emia): This condition is characterized by the presence of diplococci bacteria in the blood. Diplococci (diplo-cocci): Spherical or oval-shaped bacteria that remain in pairs following cell division are called diplococci cells. Diplocoria (diplo-coria): Diplocoria is a condition that is characterized by the occurrence of two pupils in one iris. It may result from eye injury, surgery, or it may be congenital. Diploe (diploe): Diploe is the layer of spongy bone between the inner and outer bone layers of the skull. Diploid (diplo-id): A cell that contains two sets of chromosomes is a diploid cell. In humans, somatic or body cells are diploid. Sex cells are haploid and contain one set of chromosomes. Diplogenic (diplo-genic): This term means producing two substances or having the nature of two bodies. Diplogenesis (diplo-genesis): The double formation of a substance, as seen in a double fetus or a fetus with double parts, is known as diplogenesis. Diplograph (diplo-graph): A diplograph is an instrument that can produce double writing, such as embossed writing and normal writing at the same time. Diplohaplont (diplo-haplont): A diplohaplont is an organism, such as algae, with a life cycle that alternates between fully developed haploid and diploid forms. Diplokaryon (diplo-karyon): This term refers to a cell nucleus with double the diploid number of chromosomes. This nucleus is polyploid meaning that it contains more than two sets of homologous chromosomes. Diplont (diplo-nt): A diplont organism has two sets of chromosomes in its somatic cells. Its gametes have a single set of chromosomes and are haploid. Diplopia (diplo-pia): This condition, also known as double vision, is characterized by seeing a single object as two images. Diplopia can occur in one eye or both eyes. Diplosome (diplo-some): A diplosome is a pair of centrioles, in eukaryotic cell division, that aids in spindle apparatus formation and organization in mitosis and meiosis. Diplosomes are not found in plant cells. Diplozoon (diplo-zoon): A diplozoon is a parasitic flatworm that fuses together with another of its kind and the two exist in pairs.