convertendAny proposition which is subject to the process of conversion; so called in its relation to itself as converted, after which process it is termed the converse.
convivalRelating to a feast or festivity; convivial.
coridineA colourless or yellow oil (C₁₀H₁₅N) found in coal tar, Dippel's oil, tobacco smoke, etc., regarded as an organic base homologous with pyridine.
corposantAn electrical discharge accompanied by a corona of ionization in the surrounding atmosphere
corpotentoriumA median ventral plate of the tentorium of some insects.
corpus luteumA yellow mass of cells that forms from an ovarian follicle during the luteal phase of the menstrual cycle in mammals; it secretes steroid hormones.
corpus vileA person, animal or thing treated as expendable, to therefore use as an experimental subject regardless of whatever loss or damage it may suffer as a result.
corrasionThe diminution of wealth, etc., such as through unanticipated expenditure.
correalUnder joint obligation (applied to an obligation in which the parties are severally liable).
corypheusThe conductor or leader of the dramatic chorus in Ancient Greece.
cosmolineA substance obtained from the residues of the distillation of petroleum, essentially the same as vaseline, but of somewhat stiffer consistency, and consisting of a mixture of the higher paraffins.
costmaryAn aromatic plant (Tanacetum balsamita), once used to flavour ale (prior to use of hops); also used as a bookmark in Bibles and other holy texts to dissuade silverfish and other pests.
cothurnA buskin anciently worn by tragic actors on the stage.
coticularPertaining to, similar to, or suitable for, whetstones
credobaptismPractice of the credobaptists; belief that baptism is only to be administered to those who profess their faith.
credophileOne who gets positive pleasure from belief and pain from doubt; one who collects beliefs not for utility but for glitter and for whom, once he or she has embraced a belief, it takes something more than mere disproof to make to let go.
crenationThe contraction of, or formation of abnormal notchings around, the edges of a cell after exposure to a hypertonic solution, due to the loss of water through osmosis, especially noticeable in red blood cells.
crepuscular rayA sunbeam seen just after sunset or just before sunrise, caused by a cloud below the horizon and dust particles in the air above the horizon.
cresciveIncreasing or growing; marked by gradual spontaneous development.
crescographA device for measuring growth in plants.
CressageA village in Shropshire, England (OS grid ref SJ5904).
crimen injuriaIn Roman-Dutch law, the unlawful and intentional impairment of someone's dignity (covering road rage, stalking, and various kinds of abuse).