pitch
n.— «It’s not enough that the average space between economy class seats (or “pitch,” as it’s known in industry parlance) has lost three inches since 1978. Trying to offer relief was Boeing, introducing its 787 Dreamliner with recommended eight-abreast seating.» —“Airbus Industries Standing-Room Concept” Gizmodo May 1, 2006. (source: Double-Tongued Dictionary)
Further reading
Brian from Lafayette, Indiana, wonders why chicken is abbreviated CHX in the restaurant industry. Using X as a substitute or shortener has a long history. Medieval scribes sometimes drew a line through the final stroke of an abbreviated word. This...
Outer space, used with its modern meaning, appears as early as the 1840s in a poem by Emmeline Stuart-Wortley. Soon after, Alexander von Humboldt was using variations on it in his writings about the cosmos. By 1901, H.G. Wells was using outer space...