15-letter words containing t, o, e, s

nucleosynthetic — Of or pertaining to nucleosynthesis.
null hypothesis — (in the statistical testing of a hypothesis) the hypothesis to be tested.
nutty professor — a professor or academic person who is eccentric or slightly crazy or unusual
nyquist theorem — (communications) A theorem stating that when an analogue waveform is digitised, only the frequencies in the waveform below half the sampling frequency will be recorded. In order to reconstruct (interpolate) a signal from a sequence of samples, sufficient samples must be recorded to capture the peaks and troughs of the original waveform. If a waveform is sampled at less than twice its frequency the reconstructed waveform will effectively contribute only noise. This phenomenon is called "aliasing" (the high frequencies are "under an alias"). This is why the best digital audio is sampled at 44,000 Hz - twice the average upper limit of human hearing. The Nyquist Theorem is not specific to digitised signals (represented by discrete amplitude levels) but applies to any sampled signal (represented by discrete time values), not just sound.
object database — a database format in which information is shown in the form of objects
object distance — the distance between the lens of a camera and an object being photographed.
objective prism — a large prism placed in front of the objective lens or mirror of a telescope, allowing the simultaneous acquisition of the spectra of many stars.
oblique section — a representation of an object as it would appear if cut by a plane that is other than parallel or perpendicular to its longest axis.
observation car — a railroad passenger car having a lounge or platform from which the scenery can be viewed.
observationally — of, relating to, or founded on observation, especially founded on observation rather than experiment.
obstacle course — a military training area having obstacles, as hurdles, ditches, and walls, that must be surmounted or crossed in succession.
obstructiveness — The characteristic of being obstructive.
obtuse triangle — a triangle with one obtuse angle.
ocean of storms — the largest of the dark plains (maria) on the surface of the moon, situated in the second and third quadrant
office politics — power play in the workplace
official strike — a collective stoppage of work by part or all of the workforce of an organization with the approval of the trade union concerned. The stoppage may be accompanied by the payment of strike pay by the trade union concerned
offset printing — offset (def 6).
oil of the sick — holy oil used in the sacrament of extreme unction.
oil-based paint — any paint made with a drying oil or solvent such as linseed
okhotsk current — a cold ocean current flowing SW from the Bering Sea, E of the Kurile Islands, along the E coast of Japan where it meets the Japan Current.
old clothes man — a person who deals in second-hand clothes
old wives' tale — a traditional belief, story, or idea that is often of a superstitious nature.
old-established — established for a long time
old-man-the-sea — (in The Arabian Nights' Entertainments) an old man who clung to the shoulders of Sindbad the Sailor for many days and nights.
oligomerisation — Alternative spelling of oligomerization.
omnibus edition — a television or radio programme consisting of two or more programmes broadcast earlier in the week
on a shoestring — If you do something or make something on a shoestring, you do it using very little money.
on one's mettle — roused to putting forth one's best efforts
on prescription — If a medicine is available on prescription, you can only get it from a chemist or pharmacist if a doctor gives you a prescription for it.
on short notice — with little warning
on the decrease — decreasing
on the heels of — the back part of the human foot, below and behind the ankle.
on the increase — growing, increasing
one of the boys — If a man is described as one of the boys, he is accepted by a group of male friends who do things that are thought of as typically masculine.
one's last hour — the time of one's death
one-night stand — a single performance in one locale, as by a touring theatrical company, before moving on to the next engagement.
oneirocriticism — the art of interpreting dreams.
ones complement — A system used in some computers to represent negative numbers. To negate a number, each bit of the number is inverted (zeros are replaced with ones and vice versa). This has the consequence that there are two reperesentations for zero, either all zeros or all ones. ... 000...00011 = +3 000...00010 = +2 000...00001 = +1 000...00000 = +0 111...11111 = -0 111...11110 = -1 111...11101 = -2 111...11100 = -3 ... Naive logic for ones complement addition might easily conclude that -0 + 1 = +0. The twos complement avoids this by using all ones to represent -1.
open university — higher education by correspondence
opencast mining — mining by excavating from the surface
opening batsman — a player who bats the first ball in cricket
openmouthedness — the state or condition of being filled with amazement and wonder
operationalised — Simple past tense and past participle of operationalise.
operations room — a room from which all the operations of a military, police, or other disciplined activity are controlled
ophthalmoscopes — Plural form of ophthalmoscope.
opinionatedness — The state or condition of being opinionated.
opposite number — counterpart; equivalent: New members with an interest in folk art will find their opposite numbers in the association's directory.
opposite prompt — the offstage area to the right as one faces the audience. Abbreviation: O.P.
optical scanner — the process of interpreting data in printed, handwritten, bar-code, or other visual form by a device (optical scanner or reader) that scans and identifies the data.
optical storage — optical disk drive

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