### Definition pi

#### Etymology

From Ancient Greek *πεῖ* (peî). Its mathematical use apparently stems from its use as the first letter in *περιφέρεια* (periféreia, “periphery; circumference”) and was first cited in 1706 in the *Synopsis Palmariorum Matheseos* by William Jones.

#### Noun

**pi** (*countable and uncountable*, *plural* ** pis**)

- The 16th letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
- (
) An**mathematics****irrational**and**transcendental****constant**representing the**ratio**of the**circumference**of a Euclidean**circle**to its**diameter**; approximately 3.14159265358979323846264338327950; usually written π. - (
) Metal type that has been spilled, mixed together, or disordered. Also called**letterpress****typography****pie**.

#### Verb

**pi** (*third-person singular simple present* ** pies**,

*present participle*

**,**

**piing***simple past and past participle*

**)**

**pied**- (
) To spill or mix printing type. Also, "to**letterpress****typography****pie**".

#### Adjective

**pi** (*not comparable*)

- (
) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard**typography****alphanumeric**Roman type.

### Results 100 Words with the letters PI

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###### 10 letter words with the letters PI ↑

**ABRUPTIONS**18

**ABSORPTION**17

**ABSORPTIVE**20

**ACCIPITERS**19

**ACCOMPLICE**26

**ACCOMPLISH**25

**ACIDOPHILE**20

**ACIDOPHILS**20

**ACROPHOBIA**21

**ADAPTATION**15

**ADAPTIVELY**21

**ADAPTIVITY**20

**ADIPOCYTES**19

**ADOPTIVELY**21

**ADSORPTION**15

**ADSORPTIVE**18

**AECIOSPORE**16

**AFTERPIECE**19

**AIRDROPPED**18

**AIRMANSHIP**19

**AIRPROOFED**17

**ALLOPATRIC**18

**ALLOPHONIC**21

**ALLOTROPIC**18

**ALLOTYPIES**17

**ALPHABETIC**22

**ALPHAMERIC**22

**ALPHOSISES**16

**ALTARPIECE**17

**ALTIPLANOS**16

**AMBLYOPIAS**22

**AMETROPIAS**16

**AMPHIBIANS**22

**AMPHIBIOUS**22

**AMPHIBOLES**22

**AMPHIBRACH**26

**AMPHIMACER**24

**AMPHIMIXES**28

**AMPHIMIXIS**28

**AMPHIPHILE**24

**AMPHIPLOID**23

**AMPHOTERIC**21

**AMPICILLIN**22

**AMPLIDYNES**21

**AMPLIFIERS**20

**AMPLIFYING**25

**AMPLITUDES**19

**AMPUTATING**20

**AMPUTATION**18

**AMYLOPSINS**20

**ANABAPTISM**20

**ANAGLYPHIC**24

**ANALEPTICS**18

**ANAMORPHIC**22

**ANAPESTICS**17

**ANAPLASIAS**15

**ANAPLASTIC**18

**ANEUPLOIDS**17

**ANEUPLOIDY**19

**ANGIOSPERM**19

**ANISOTROPY**16

**ANOPHELINE**18

**ANTEPENDIA**16

**ANTHROPOID**17

**ANTICIPANT**18

**ANTICIPATE**17

**ANTIHERPES**16

**ANTILEPTON**16

**ANTIPASTOS**14

**ANTIPHONAL**18

**ANTIPIRACY**19

**ANTIPLAGUE**18

**ANTIPLAQUE**25

**ANTIPODALS**16

**ANTIPODEAN**16

**ANTIPOETIC**17

**ANTIPOLICE**18

**ANTIPROTON**15

**ANTIPYRINE**17

**ANTISEPSES**14

**ANTISEPSIS**14

**ANTISEPTIC**17

**APARTHEIDS**16

**APHAERESIS**15

**APHAERETIC**18

**APHORISING**18

**APHORISTIC**18

**APHORIZING**27

**APICULTURE**19

**APIOLOGIES**16

**APOAPSIDES**17

**APOCARPIES**19

**APODEICTIC**20

**APOLITICAL**18

**APOLOGETIC**19

**APOLOGISED**17

**APOLOGISES**16

**APOLOGISTS**16

**APOLOGIZED**26

**APOLOGIZER**25

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