Biology Prefixes and Suffixes: diplo-

Gonorrhea Bacterium
Conceptual visualization of the diplococcus bacterium gonorrhea (Neisseria gonorrhoeae) that causes the sexually transmitted disease gonorrhea. Credit: Science Picture Co/Subjects/Getty Images

Biology Prefixes and Suffixes: diplo-


The prefix (diplo-) means double, twice as many or twice as much. It is derived from the Greek diploos meaning double.


Diplobacilli (diplo-bacilli) - rod-shaped bacteria that remain in pairs following cell division. They are joined end to end.

Diplobacteria (diplo-bacteria) - bacteria cells that are joined in pairs.

Diplocardia (diplo-cardia) - a condition in which the two lateral halves of the heart are separated by a fissure or groove.

Diplococci (diplo-cocci) - spherical or oval-shaped bacteria that remain in pairs following cell division.

Diploid (diplo-id) - pertaining to a cell containing two sets of chromosomes.

Diplogenic (diplo-genic) - 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.

Diplograph (diplo-graph) - an instrument that can produce double writing, such as embossed writing and normal writing at the same time.

Diplohaplontic (diplo-haplont) - organisms, such as algae, that have a life cycle that alternates between fully developed haploid and diploid forms.

Diplokaryon (diplo-karyon) - 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) - an organism that has two sets of chromosomes in its somatic cells.

Its gametes have a single set of chromosomes and are haploid.

Diplozoon (diplo-zoon) - a parasitic flatworm that fuses together with another of its kind and the two exist in pairs.