Definition of virtual. Meaning of virtual. Synonyms of virtual
Here you will find one or more explanations in English for the word virtual. Also in the bottom left of the page several parts of wikipedia pages related to the word virtual and, of course, virtual synonyms and on the right images related to the word virtual.
Definition of virtual
VirtualVirtual Vir"tu*al (?; 135), a. [Cf. F. virtuel. See Virtue.]
1. Having the power of acting or of invisible efficacy
without the agency of the material or sensible part;
Heat and cold have a virtual transition, without
communication of substance. --Bacon.
Every kind that lives, Fomented by his virtual
power, and warmed. --Milton.
2. Being in essence or effect, not in fact; as, the virtual
presence of a man in his agent or substitute.
A thing has a virtual existence when it has all the
conditions necessary to its actual existence.
To mask by slight differences in the manners a
virtual identity in the substance. --De Quincey.
Principle of virtual velocities (Mech.), the law that when
several forces are in equilibrium, the algebraic sum of
their virtual moments is equal to zero.
Virtual focus (Opt.), the point from which rays, having
been rendered divergent by reflection of refraction,
appear to issue; the point at which converging rays would
meet if not reflected or refracted before they reach it.
Virtual image. (Optics) See under Image.
Virtual moment (of a force) (Mech.), the product of the
intensity of the force multiplied by the virtual velocity
of its point of application; -- sometimes called virtual
Virtual velocity (Mech.), a minute hypothetical
displacement, assumed in analysis to facilitate the
investigation of statical problems. With respect to any
given force of a number of forces holding a material
system in equilibrium, it is the projection, upon the
direction of the force, of a line joining its point of
application with a new position of that point indefinitely
near to the first, to which the point is conceived to have
been moved, without disturbing the equilibrium of the
system, or the connections of its parts with each other.
Strictly speaking, it is not a velocity but a length.
Virtual work. (Mech.) See Virtual moment, above.
Meaning of virtual from wikipedia
, the quality
of something without sharing
its (real or imagined) physical
- virtual reality
(vr) is a term that applies
to computer-simulated environments
that can simulate physical presence
in the real
- private european
such as nordig
or nds also known
as a virtual channel
as used in atsc si metadata, for atsc is a channel
- a virtual machine
(vm) is a software implemented abstraction
of the underlying hardware
to the application layer
- the term virtual
is a concept applied
in many fields
with somewhat differing
connotations, and also, differing
- a virtual world
is an online community
the form of a computer-based simulated environment through which users
- in computing
, virtual memory
is a memory management technique developed
for multitasking kernels
. this technique virtualizes
- in physics
, a virtual particle
is a transient fluctuation
many of the characteristics
of an ordinary
particle, but that
- a virtual community
is a social network
who interact through specific social media
, potentially crossing geographical
- a virtual museum
is a museum
. a virtual museum
is also known
as an online