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Aalen model

Aalen model   Quick reference

A Dictionary of Statistics (3 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Mathematics and Computer Science
Length:
56 words
Illustration(s):
1

A *linear regression model describing the manner in which the *expected value of a response variable, Z(...

Aardvark

Aardvark   Reference library

The Encyclopedia of Mammals (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Life Sciences
Length:
1,361 words
Illustration(s):
3

Few people have had the fortune of a close encounter with the aardvark, one of Africa's most bizarre and specialized

abdominal injury

abdominal injury   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Medicine and health
Length:
201 words
Illustration(s):
3
Physical damage to the abdomen and its contents. The abdomen is particularly vulnerable to blows during contact and collision sports. Most blows to the abdomen result in nothing more ... More
abduction

abduction   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007
Subject:
Science and technology, Medicine and health
Length:
35 words
Illustration(s):
1

Movement of a body segment (e.g. arm or leg) away from the midline of the body. The term also refers to the movement of fingers or toes when they are spread apart. ...

abductor muscle

abductor muscle   Quick reference

A Dictionary of Zoology (4 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
26 words
Illustration(s):
1

A muscle that draws a structure (e.g. a limb) away from the centre line of the body. Compare adductor muscle

aberration

aberration   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
218 words
Illustration(s):
1
1. (in optics) A defect in the image formed by a lens or curved mirror. In chromatic aberration the image formed by a lens (but not a mirror) has coloured fringes as a result ... More
aberration of starlight

aberration of starlight   Quick reference

A Dictionary of Astronomy (3 ed.)

Reference type:
Subject Reference
Current Version:
2018
Subject:
Science and technology, Astronomy and Cosmology
Length:
152 words
Illustration(s):
1
The small apparent difference between the observed direction of a star and its true direction (see diagram). It is due to the combined effect of the observer’s motion across the path of ... More
abscisic acid

abscisic acid   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
34 words
Illustration(s):
1

a plant hormone synthesized by chloroplasts. High levels of abscisic acid result in the abscission of leaves, flowers, and fruits.

absolute configuration

absolute configuration   Quick reference

A Dictionary of Chemistry (7 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Science and technology, Chemistry
Length:
573 words
Illustration(s):
1

A way of denoting the absolute structure of an optical isomer (see optical activity). Two conventions are in use: The ...

absolute encoder

absolute encoder   Quick reference

A Dictionary of Mechanical Engineering

Reference type:
Subject Reference
Current Version:
2013
Subject:
Science and technology, Engineering and Technology
Length:
82 words
Illustration(s):
1

A device which provides a continuous digital output representing angle or position. The output is normally obtained from a number

absolute value

absolute value   Quick reference

The Concise Oxford Dictionary of Mathematics (5 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Mathematics and Computer Science
Length:
41 words
Illustration(s):
1

For any real number the absolute value (also called the *modulus) of denoted by is itself if and ...

abstraction

abstraction   Quick reference

A Dictionary of Chemistry (7 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Science and technology, Chemistry
Length:
42 words
Illustration(s):
1

A chemical reaction that involves bimolecular removal of an atom or ion from a molecule. An example is the abstraction of hydrogen from methane by reaction with a radical:...

acceleration

acceleration   Quick reference

A Dictionary of Chemical Engineering

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Engineering and Technology
Length:
108 words
Illustration(s):
1

The rate of change of speed or velocity with respect to time. If the acceleration is constant then the final velocity, ...

acceleration

acceleration   Quick reference

A Dictionary of Physics (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Physics
Length:
107 words
Illustration(s):
1

Symbol a. The rate of increase of speed or velocity. It is measured in m s−2. For a body moving linearly with constant acceleration ...

Accentors

Accentors   Reference library

The New Encyclopedia of Birds

Reference type:
Subject Reference
Subject:
Science and technology, Life Sciences
Length:
1,093 words
Illustration(s):
2

Accentors do not have spectacular plumage, they behave unobtrusively, and most species live at high altitude and are poorly known.

acceptance–rejection algorithm

acceptance–rejection algorithm   Quick reference

A Dictionary of Statistics (3 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Mathematics and Computer Science
Length:
179 words
Illustration(s):
1

A method for generating values of a *continuous random variable for use in a *simulation. Suppose that the random variable ...

access vector

access vector   Quick reference

A Dictionary of Computer Science (7 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Science and technology, Mathematics and Computer Science
Length:
90 words
Illustration(s):
1

A vector that is used in the representation of a *ragged array. For example, the elements of a

accommodation

accommodation   Reference library

The Oxford Companion to the Body

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Life Sciences
Length:
800 words
Illustration(s):
1

Optical instruments (such as microscopes, cameras, and some telescopes) work by passing light through the curved surfaces of lenses, where

accretionary wedge

accretionary wedge   Quick reference

A Dictionary of Geology and Earth Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2013
Subject:
Science and technology, Earth Sciences and Geography
Length:
76 words
Illustration(s):
1

A tectonically thickened wedge of *sediment found on the landward side of some *trenches. The accretionary wedge consists of oceanic sediment scraped off the subducting ...

acenaphthene

acenaphthene   Quick reference

A Dictionary of Chemistry (7 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Science and technology, Chemistry
Length:
25 words
Illustration(s):
1

A colourless crystalline aromatic compound, C12H10; m.p. 95°C; b.p. 278°C. It is an intermediate in the production of some dyes....

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