# discontinuity

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## dis·con·ti·nu·i·ty

(dĭs-kŏn′tə-no͞o′ĭ-tē, -nyo͞o′-)
n. pl. dis·con·ti·nu·i·ties
1. Lack of continuity, logical sequence, or cohesion.
2. A break or gap.
3. Geology A surface at which seismic wave velocities change.
4. Mathematics
a. A point at which a function is defined but is not continuous.
b. A point at which a function is undefined.

## discontinuity

(dɪsˌkɒntɪˈnjuːɪtɪ)
n, pl -ties
1. lack of rational connection or cohesion
2. a break or interruption
3. (Mathematics) maths
a. the property of being discontinuous
b. the point or the value of the variable at which a curve or function becomes discontinuous
4. (Geological Science) geology
a. a zone within the earth where a sudden change in physical properties, such as the velocity of earthquake waves, occurs. Such a zone marks the boundary between the different layers of the earth, as between the core and mantle. See also Mohorovičić discontinuity
b. a surface separating rocks that are not continuous with each other
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## dis•con•ti•nu•i•ty

(ˌdɪs kɒn tnˈu ɪ ti, -ˈyu-)

n., pl. -ties.
1. lack of continuity; irregularity.
2. a break or gap.
3. a point at which a mathematical function is not continuous.
[1560–70; < Medieval Latin]

## Discontinuity

lose the thread To lose one’s train of thought in a discussion; to have the continuity of one’s thoughts or words interrupted. Thread in this phrase is the central thought connecting successive points, a continuous flow which is carried on in spite of digressions or interruptions. This figurative use of thread dates from the mid-17th century.

We laughed so violently … that he could not recover the thread of his harangue. (Frances Burney, Diary and Letters, 1782)

side-track To diverge from the main subject, course, or road; to go off on a tangent; to shelve or otherwise delay consideration of some matter. Literally, to side-track means to shunt a train onto a siding, off the main track, hence its figurative implications.

The business of the minister is to preach the gospel, not … to side-track on great moral issues. (Advance [Chicago, Illinois], June, 1893)

A related expression which also employs railroad terminology is off the track.

table In U.S. parliamentary procedure this verb means to ‘postpone action on’:

The amendment which was always present, which was rejected and tabled and postponed. (The Century XXXVII, 1873)

In British parliamentary procedure, it means to ‘present for discussion’:

If any more “Old Residents” wish to be heard, they must table their names. (Pall Mall Gazette, Jan. 3, 1887)

This is a confusing state of affairs and must be watched carefully by those encountering the term in what may be foreign contexts.

## discontinuity

A zone that marks a boundary between different layers of the Earth, such as between the mantle and the core, and where the velocity of seismic waves changes.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 discontinuity - lack of connection or continuityseparation - the state of lacking unitycontinuity - uninterrupted connection or union
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

## discontinuity

noun lack of unity, disconnection, incoherence, disunion, lack of coherence, disjointedness, disconnectedness The text suffers from discontinuity.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

## discontinuity

noun
A cessation of continuity or regularity:
Translations

## discontinuity

[ˌdɪskɒntɪˈnjuːɪtɪ] N (= lack of continuity) → ; (= interruption) →
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

## discontinuity

[ˌdɪsˌkɒntɪˈnjuːɪti] n
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

## discontinuity

n f (geh); a certain amount of discontinuity; to reduce any discontinuity to a minimumdie Kontinuität möglichst wenig unterbrechen
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

## discontinuity

[dɪsˌkɒntɪˈnjuːɪtɪ] (frm) n (quality) → discontinuità f inv; (gap) →
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
In the absence of a valid control group, we employed a regression discontinuity design to approximate experimental conditions while leveraging the existing program structure.
We aimed to assess the frequency and pattern of ossicular involvement, the distribution of the affected ossicles, the rate of discontinuity or fixation, and its impact on the audiological outcomes in a mid-term follow-up period.
Continuity and Discontinuity in Learning Careers: Potentials for a Learning Space in a Changing World
The microstrip discontinuity t-line can be miniaturized and integrated with the CMOS process and provide good mechanical support for both passive and active microwave devices [3], [4].
First, the empirical work employs a regression discontinuity (RD) design to thoroughly quantify the decrease in suicides at age 62.
However, such sampling biases the apparent abundance of the orientations, because the probability that a particular discontinuity is intersected by a scanline depends on its orientation [6, 7].
In a territory with a discontinuity, two continuous areas are divided by a physical element (e.g., sea, lake, or river) and cannot be travelled using a single mode in a continuous time (i.e., pedestrian, bicycle, or private car on road).
Figure 5 shows an example of discontinuity path with and without correction in a mesh of triangular finite element.
In its final report, the council says that during the aircraft's initial climb after takeoff from Taipei Songshan airport, an intermittent discontinuity in the right-hand engine's auto feather unit (AFU) may have initiated the automatic take-off power control system (ATPCS) sequence, resulting in the autofeather of the right-side engine.
The 'BB+' rating is based on BoC's Long-term Issuer Default Rating (IDR) of 'B-', an unchanged IDR uplift of 1, an unchanged Discontinuity Cap (D-Cap) of 8 notches (minimal discontinuity risk), and the 47% committed OC that Fitch takes into account in its analysis, which provides more protection than the unchanged 41.8% 'BB+' breakeven OC.
where, RQD is the percent of competent drill-core sticks >100 mm in length in a selected domain, [J.sub.n] is the rating for the number of joint sets (9 for 3 sets, 4 for 2 sets, etc.) in the same domain, [J.sub.r] is the rating for the roughness of the least favorable of these joint sets or filled discontinuities, [J.sub.a] is the rating for the degree of alteration or clay filling of the least favorable joint set discontinuity, [J.sub.w] is the rating for the water inflow and pressure effects, which may cause outwash of discontinuity infillings, and SRF is the rating for faulting, for strength/stress ratios in hard massive rocks, for squeezing or for swelling.

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