*n*. A haiku on the theme of the mathematical constant pi. Also:

**piku**. [

*pi*+

*haiku*.]

**Example Citations:**

Students will spend the morning in 35-minute sessions that include math competitions, integrated math and art workshops featuring origami,

—Kari Tutwiler, "Pi and pie to fuel math competition at WSU Tri-Cities,"

**pi-ku**writing, and a pi(e) eating contest.—Kari Tutwiler, "Pi and pie to fuel math competition at WSU Tri-Cities,"

*Washington State University News Center*, March 11, 2013

Festivities will include pie eating/pi solving contest, pie for sale at the Pie Café,

—"Third Annual Jersey City Pi-e Day March 9th,"

**Piku**(think Haiku with a twist).—"Third Annual Jersey City Pi-e Day March 9th,"

*Jersey Bites*, March 9, 2013

**Earliest Citation:**

Fifth-graders in Tiffany Ebright and Stefanie Cook's classes at Fulton Avenue School #8 in Oceanside celebrated Pi Day in honor of Albert Einstein's birthday. Pi is the ratio between the circumference and the diameter of a circle. The children wrote a

—Mary Ellen Pereira, "Jericho's team bowls them over,"

**pi-ku**, designed pi posters and competed in a pie-eating contest.—Mary Ellen Pereira, "Jericho's team bowls them over,"

*Newsday*, April 9, 2006

**Notes:**

Why, look, it's yet another term posted in honor of Pi Day, which is March 14. In case you've forgotten, March 14 can be written as 3/14, and the decimal expansion of pi begins with 3.14, ergo pi lovers celebrate their favorite transcendental number every March 14.

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