19-letter words containing o, f, t, p, i, c
- point of inflection — inflection point.
- post office problem — (algorithm) Given a set of points (in N dimensions), find another point which minimises the sum of the distances from that point to each of the others.
- post-and-rail fence — a fence constructed of upright wooden posts with horizontal timber slotted through it
- presumption of fact — a presumption based on experience or knowledge of the relationship between a known fact and a fact inferred from it.
- production platform — offshore power station
- reciprocity failure — a failure of the two exposure variables, light intensity and exposure time, to behave in a reciprocal fashion at very high or very low values
- republic of letters — the collective body of literary people.
- republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
- sacrifice operative — a euphemistic term for a suicide bomber
- shopping facilities — shops or other retail services
- south pacific ocean — the part of the Pacific Ocean extending S from the Equator to the Antarctic continent.
- specular reflection — Specular reflection is reflection of heat or light in which the angles of different parts of the surface are important.
- speculative fiction — a broad literary genre encompassing any fiction with supernatural, fantastical, or futuristic elements
- teaching fellowship — a fellowship providing a student in a graduate school with free tuition and expenses and stipulating that the student assume some teaching duties in return.
- the patriotic front — a political party in Zimbabwe, founded in 2001 as a coalition of two communist parties, the Zimbabwe African Peoples Union (ZAPU) and the Zimbabwe African National Union (ZANU), which had worked together to fight against White minority rule in Rhodesia
- to the prejudice of — to the detriment of
- tropic of capricorn — Astronomy. the Goat, a zodiacal constellation between Sagittarius and Aquarius.