13-letter words containing a, r, e, c, o, l
- obstacle race — a foot race in which the contestants are prevented in a specific way from covering the full course at top speed, as by having hurdles to jump, sacks enclosing the legs, or potatoes to pick up.
- obstetrically — (medicine) In terms of obstetrics.
- old provencal — the Provençal language as found in documents from the 11th to the 16th centuries. Abbreviation: OPr.
- olfactometers — Plural form of olfactometer.
- olfactometric — Of or pertaining to olfactometry.
- omnicorporeal — Comprehending or including all bodies; embracing all substance.
- optical drive — optical disk drive
- optical fiber — optical fibre
- optical fibre — (communications) (fibre optics, FO, US "fiber", light pipe) A plastic or glass (silicon dioxide) fibre no thicker than a human hair used to transmit information using infra-red or even visible light as the carrier (usually a laser). The light beam is an electromagnetic signal with a frequency in the range of 10^14 to 10^15 Hertz. Optical fibre is less susceptible to external noise than other transmission media, and is cheaper to make than copper wire, but it is much more difficult to connect. Optical fibres are difficult to tamper with (to monitor or inject data in the middle of a connection), making them appropriate for secure communications. The light beams do not escape from the medium because the material used provides total internal reflection. See also FDDI, Optical Carrier n, SONET.
- oraculousness — the state of being oraculous
- orchard valve — an alfalfa valve of lesser diameter than the pipe it closes.
- orchestralist — a person who writes or arranges orchestral music
- ordinal scale — a scale on which data is shown simply in order of magnitude since there is no standard of measurement of differences: for instance, a squash ladder is an ordinal scale since one can say only that one person is better than another, but not by how much
- orsellic acid — an acid found in lichens
- orthocephalic — having a medium or intermediate relation between the height of the skull and the breadth or length.
- orthoepically — In terms of correct pronunciation.
- orthopaedical — Pertaining to orthopaedics; characteristic of orthopaedia.
- orthosilicate — a silicate mineral
- over-analytic — pertaining to or proceeding by analysis (opposed to synthetic).
- over-reliance — confident or trustful dependence.
- overallocated — Allocated in excess.
- overbalancing — Present participle of overbalance.
- overexcitable — Excessively excitable.
- oversocialize — to make social; make fit for life in companionship with others.
- overspeculate — to engage in thought or reflection; meditate (often followed by on, upon, or a clause).
- palaeocrystic — consisting of former glacial formation
- palaeocurrent — an ancient current, esp of water, evidence of which has been preserved in sedimentary rocks as fossilized ripple marks, etc
- paleotropical — belonging or pertaining to a geographical division comprising the Ethiopian and Oriental regions.
- parencephalon — a cerebral hemisphere
- parti-colored — having different colors in different areas or patches; variegated: a parti-colored dress.
- particleboard — a boardlike building material made by compressing sawdust or wood particles with a resin binder
- party-colored — having different colors in different areas or patches; variegated: a parti-colored dress.
- pastoral care — help with personal needs and problems given by a teacher
- pearl tapioca — a food substance prepared from cassava in granular, flake, pellet (pearl tapioca) or flour form, used in puddings, as a thickener, etc.
- pencil crayon — coloured pencil
- perchlorinate — to combine with the maximum proportion of chlorine.
- periodicalist — a writer of articles for periodicals
- perissodactyl — having an uneven number of toes or digits on each foot.
- personal call — a private phone call
- personal care — assistance in dressing, grooming, etc., provided to elderly, disabled, or other persons who are unable to care for themselves.
- personalistic — Also called personal idealism. a modern philosophical movement locating ultimate value and reality in persons, human or divine.
- petrochemical — a chemical substance obtained from petroleum or natural gas, as gasoline, kerosene, or petrolatum.
- petrophysical — relating to the analysis of the constitution and characteristics of rocks
- phallocentric — a doctrine or belief centered on the phallus, especially a belief in the superiority of the male sex.
- phlebographic — relating to phlebography or the X-ray imaging of a vein that has been injected with a dye that is visible on the image taken
- photoallergic — photosensitive.
- pictorialness — the state of being pictorial
- place of arms — an area in a fortress or a fortified town where troops could assemble for defense.
- platonic year — a period of about 26,000 years, equal to the time required for a complete revolution of the equinoxes.
- pleurocarpous — (of certain mosses) bearing the fructifications along the main stem or lateral branches.