# phase
## English
### Etymology 1

From New Latin phasis, from Ancient Greek φάσις (phásis, “an appearance”), from φάω (pháō, “to shine”); compare phantasm and see face.

#### Pronunciation

* enPR: fāz, IPA: /feɪz/
* Audio (US):(file)
* Rhymes: -eɪz
* Hyphenation: phase
* Homophone: faze

#### Noun

phase (plural phases)
* A distinguishable part of a sequence or cycle occurring over time.
* That which is exhibited to the eye; the appearance which anything manifests, especially any one among different and varying appearances of the same object.
* Any appearance or aspect of an object of mental apprehension or view.
    The problem has many phases.
* (astronomy) A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form, or the absence, of a body's illuminated disk. Illustrated in Wikipedia's article Lunar phase.
    the phases of the moon
* (physics) Any one point or portion in a recurring series of changes, as in the changes of motion of one of the particles constituting a wave or vibration; one portion of a series of such changes, in distinction from a contrasted portion, as the portion on one side of a position of equilibrium, in contrast with that on the opposite side.
* (chemistry) A component in a material system that is distinguished by chemical composition and/or physical state (solid, liquid or gas) and/or crystal structure. It is delineated from an adjoining phase by an abrupt change in one or more of those conditions.
* (zoology) In certain organisms, one of two or more colour variations characteristic of the species, but independent of the ordinary seasonal and sexual differences, and often also of age.
* (rugby union) The period of play between consecutive breakdowns.
** 2011 September 24, Ben Dirs, “Rugby World Cup 2011: England 67-3 Romania”, in BBC Sport‎:When Romania did manage to string together some phases midway through the first half, England's discipline held firm, although on the whole it was a less focused display from the Six Nations champions in the second half.
* (genetics) A haplotype.
* (mathematics) The counterclockwise angle from the positive half of the real number line to the vector pointing to a complex number on an Argand diagram of the complex plane, which has the positive real line pointing right and the positive imaginary number line pointing up.
    Synonym: argument
* (music) A distortion caused by a difference in the speed of propagation for different frequencies
* (electrical engineering) In a polyphase electrical power system, one of the power-carrying conductors, or the alternating current carried by it.

##### Derived terms

* acrophase
* acute-phase protein
* antiphase
* aqueous phase
* bathyphase
* biophase
* biphase
* Chevrel phase
* continuous phase
* counterphase
* delayed sleep phase disorder
* dephase
* diphase
* disperse phase
* dyke phase
* ecophase
* eigenphase
* epiphase
* ferriphase
* FFLO phase
* follicular phase
* G1 phase
* G2 phase
* gaseous phase
* geophase
* gyrophase
* heterophase
* high-phase
* homophase
* hypophase
* idiophase
* in phase
* intermetallic phase
* interphase
* intraphase
* Laves phase
* liquid phase
* lunar phase
* luteal phase
* macrophase
* mesophase
* metaphase
* microphase
* misphase
* mobile phase
* monophase
* moonphase
* multiphase
* nanophase
* out of phase
* penalty phase
* phase angle
* phase contrast microscope
* phase contrast microscopy
* phase diagram
* phase down
* phase factor
* phase function
* phase inverter
* phaseless
* phase-locked loop
* phasematched
* phasematching
* phasemeter
* phase modulation
* phase modulator
* phase of matter
* phase of the moon
* phase-out
* phase plane
* phase rule
* phase separation
* phaseshift
* phase shifter
* phase-shift keying
* phase shift keying
* phase space
* phase tester
* phase trafficked
* phase trafficking
* phase transfer catalysis
* phase-transfer catalyst
* phase transition
* phase velocity
* phasic
* phasome
* phason
* phasor
* phenophase
* phirotope
* photophase
* prephase
* prophase
* protophase
* pseudophase
* quadriphase
* quarter-phase
* scotophase
* single-phase
* solid phase
* S phase
* split-phase power
* stationary phase
* stationary phase approximation
* subphase
* synphase
* synthesis phase
* talking phase
* tectophase
* three-phase
* triphase
* trophophase
* two-phase
* two-phase commit
* zerophase

##### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

##### References

* phase on Wikipedia.Wikipedia

#### Verb

phase (third-person singular simple present phases, present participle phasing, simple past and past participle phased)
* (with in or out) To begin—if construed with "in"—or to discontinue—if construed with out—(doing) something over a period of time (i.e. in phases).
    The use of the obsolete machines was gradually phased out as the new models were phased in.
* (genetics, informal, transitive) To determine haplotypes in (data) when genotypes are known.
* To pass into or through a solid object.
** 1997, P. Lunenfeld, “Hybrid Architectures and the Paradox of Unfolding”, in Intelligent Environments: Spatial Aspects of the Information Revolution, →ISBN, page 443:Anyone who has lost their way in cyberspace—realizing they have just phased into what they had previously categorized as 'solid' matter—will understand this example.
** 2004, Paul Ruditis, Star Trek: Enterprise: Shockwave, →ISBN, page 100:Archer took a deep breath and, steeling himself for the bizarre experience, carefully walked to the bulkhead and phased through.
** 2011, Timothy Callahan, Grant Morrison: The Early Years, →ISBN, page 93:Intangible or invisible objects in comic books are often drawn with a dotted line. When Kitty Pryde of the X-Men phases through objects, she's drawn that way, and Wonder Woman's invisible plan[sic] used to be drawn that way as well.
* (science fiction) To use a phaser.

##### Hyponyms

* phase in
* phase out

##### Derived terms

* phaseable
* rephase
* unphased

### Etymology 2
#### Verb

phase (third-person singular simple present phases, present participle phasing, simple past and past participle phased)
* Antique form of faze.

##### Usage notes

See notes at faze.

### Etymology 3

From Latin phase (“passover”), Phasa, from Hebrew פָּסַח (pésach).

#### Alternative forms

* Phase

#### Proper noun

phase
* (obsolete) Passover

### References

* ↑ Paul Brians (2009) “faze/phase”, in Common Errors in English Usage, 2nd edition, Wilsonville, Or.: William, James & Company, →ISBN.

### Anagrams

* HEPAs, Heaps, ephas, heaps, shape

## Dutch
### Noun

phase f (plural phasen or phases, diminutive phasetje n)
* Obsolete spelling of fase.

## French
### Pronunciation

* IPA: /faz/
* Audio:(file)

### Noun

phase f (plural phases)
* phase

#### Derived terms

* espace des phases
* phase de poule
* phase éruptive

#### Descendants

* → Dutch: fase, phase (obsolete)
** Afrikaans: fase
** → Indonesian: fase
** → West Frisian: faze
* → Georgian: ფაზა (paza)
* → Khmer: ផាស (phaah)
* → Norwegian: fase
* → Romanian: fază
* → Turkish: faz
* → Vietnamese: pha

### Further reading

* “phase”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

## Latin
### Alternative forms

* Phase

### Etymology

From Ancient Greek φασέκ (phasék, “Passover”), from a Semitic language.

### Noun

phase n (indeclinable)
* Passover
* the Passover sacrifice; Paschal Lamb

#### Synonyms

* pascha

#### Descendants

* Old English: phase

### References

* “Phase”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press

## Portuguese
### Noun

phase f (plural phases)
* Pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) of fase.