13-letter words containing a, s, l, o
- oil-based mud — Oil-based mud is a drilling fluid that is an emulsion containing oil as the base fluid.
- oilspot glaze — a brown or black ceramic glaze dotted with silvery spots caused by impurities.
- old ritualist — Raskolnik.
- old stone age — the Paleolithic period.
- old testament — the first of the two main divisions of the Christian Bible, comprising the Law, the Prophets, and the Hagiographa. In the Vulgate translation all but two books of the Apocrypha are included in the Old Testament.
- old-fashioned — of a style or kind that is no longer in vogue: an old-fashioned bathing suit.
- olfactologist — a medical specialist in the sense of smell
- olfactometers — Plural form of olfactometer.
- oligosiloxane — (organic chemistry) Any polysiloxane having a relatively small number of -Si-O- groups.
- olympic games — international sports event
- omoplatoscopy — Divination by use of a shoulder blade.
- onanistically — In an onanistic manner.
- onomastically — In an onomastic way.
- onomatologist — One versed in the history of names.
- opera glasses — small binoculars
- opthalmoscope — Misspelling of ophthalmoscope.
- optical glass — any of several types of high-quality, homogeneous, color-free glass, as flint or crown glass, having specified refractive properties, used in lenses and other components of optical systems.
- optical mouse — (hardware) Any kind of mouse that uses visible light or infrared to detect changes in its position.
- optical sound — sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack.
- oraculousness — the state of being oraculous
- oral solution — An oral solution is a medicine in liquid form for drinking.
- 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
- ordinary loss — An ordinary loss is a loss in the course of normal business.
- organ whistle — a steam or air whistle in which the jet is forced up against the thin edge of a pipe closed at the top.
- organosilicon — pertaining to or noting an organic compound containing silicon, especially where attached directly to a carbon atom.
- orgiastically — In an orgiastic fashion.
- originalities — Plural form of originality.
- orismological — relating to orismology
- orlando lasso — Orlando di [dee] /di/ (Show IPA), (Orlandus Lassus) 1532–94, Flemish composer.
- ornamentalism — the desire or tendency to feature ornament in the design of buildings, interiors, furnishings, etc.
- ornamentalist — A person who ornaments.
- orsellic acid — an acid found in lichens
- orthogonalise — to make (vectors, functions, etc.) orthogonal.
- orthosilicate — a silicate mineral
- oscillational — characterized by oscillation
- oscillographs — Plural form of oscillograph.
- oscillography — a device for recording the wave-forms of changing currents, voltages, or any other quantity that can be translated into electric energy, as sound waves.
- osmoregulator — Any organism that practices osmoregulation.
- osteoblastoma — (oncology) an uncommon osteoid tissue-forming primary neoplasm of the bone.
- osteoplasties — Plural form of osteoplasty.
- outlaw strike — wildcat strike.
- outstandingly — prominent; conspicuous; striking: an outstanding example of courage.
- outwash plain — Geology. a broad, sloping landform built of coalesced deposits of outwash.
- overappraisal — An appraisal that overvalues something.
- overlay glass — case glass.
- 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).
- overstability — the state of being excessively stable
- overstimulate — to stimulate too much