12-letter words containing c, e, l, o
- open cluster — a comparatively young, irregularly shaped group of stars, often numbering up to several hundred, and held together by mutual gravitation; usually found along the central plane of the Milky Way and other galaxies.
- open couplet — a couplet that concludes with a run-on line.
- operatically — of or relating to opera: operatic music.
- optical grep — vgrep
- optometrical — the practice or profession of examining the eyes, by means of suitable instruments or appliances, for defects in vision and eye disorders in order to prescribe corrective lenses or other appropriate treatment.
- oracle bones — animal bones used for divination
- oracularness — the state of being oracular
- oral society — a society that has not developed literacy
- orchestrally — In an orchestral manner.
- organoleptic — perceived by a sense organ.
- orichalceous — relating to or resembling orichalc
- orthopedical — (American spelling) Alternative form of orthopaedical.
- oscillometer — an instrument for measuring oscillations, especially those of the arterial pulse.
- oscillometry — an instrument for measuring oscillations, especially those of the arterial pulse.
- oscilloscope — a device that gives a visual graph of amplitude versus time of a measured signal, as voltage or current.
- osteoblastic — a bone-forming cell.
- osteoclastic — (pathology) Of or pertaining to an osteoclast.
- osteological — Of or relating to osteology.
- osteomalacia — a condition characterized by softening of the bones with resultant pain, weakness, and bone fragility, caused by inadequate deposition of calcium or vitamin D.
- osteomalacic — a condition characterized by softening of the bones with resultant pain, weakness, and bone fragility, caused by inadequate deposition of calcium or vitamin D.
- osteoplastic — Surgery. pertaining to osteoplasty.
- otosclerosis — formation of new bone about the stapes or cochlea, resulting in hearing loss.
- out of place — a particular portion of space, whether of definite or indefinite extent.
- out of scale — If something is out of scale with the things near it, it is too big or too small in relation to them.
- outplacement — counseling and assistance in finding a new job, provided by a company for an employee who has been or is about to be dismissed.
- oven cleaner — a liquid, often foam in an aerosol container, designed to clean ovens
- over-complex — composed of many interconnected parts; compound; composite: a complex highway system.
- overbalanced — Simple past tense and past participle of overbalance.
- overbalances — Third-person singular simple present indicative form of overbalance.
- overclassify — to classify to excess
- overclocking — Computers. to modify (a hardware component, as a processor, graphics card, or memory) so as to increase the speed of that component beyond the specifications of the manufacturer: You can overclock your video card to improve its performance.
- overclouding — Present participle of overcloud.
- overcoloured — excessively coloured
- overcritical — excessively critical; hypercritical.
- overdelicate — extremely or excessively delicate: an overdelicate digestive system.
- overexplicit — excessively explicit
- overinclined — extremely or excessively inclined (to)
- overreliance — confident or trustful dependence.
- owl's clover — any of several western American plants belonging to the genus Orthocarpus, of the figwort family, having dense spikes of flowers in a variety of colors with conspicuous bracts.
- owl's-clover — any of a genus (Orthocarpus) of plants of the figwort family of W North and South America; esp., a California species (O. purpurascens) with red or purple upper leaves
- oxyacetylene — noting or pertaining to a mixture of oxygen and acetylene: an oxyacetylene torch.
- oxycellulose — any substance formed naturally or synthetically by the oxidation of cellulose.
- oxygen cycle — the process by which oxygen released into the atmosphere by photosynthetic organisms is taken up by aerobic organisms while the carbon dioxide released as a by-product of repiration is taken up for photosynthesis.
- oxygen lance — a tube for conveying oxygen, used in various thermal cutting or steelmaking operations.
- pack of lies — false account
- paedophiliac — an adult who is sexually attracted to young children.
- palaeolithic — the period of the emergence of primitive man and the manufacture of unpolished chipped stone tools, about 2.5 million to 3 million years ago until about 12 000 bc
- paleoclimate — the climate of some former period of geologic time.
- paleoecology — the branch of ecology dealing with the relations and interactions between ancient life forms and their environment.
- paleological — the study of antiquities.