18-letter words containing onal
- personal organizer — a small notebook with sections for personal information, as dates and addresses.
- prepositional verb — a combination of verb and preposition, often with idiomatic meaning, differing from other phrasal verbs in that an object must always follow the preposition, as take after in The children take after their mother.
- principal diagonal — a diagonal line or plane.
- proportional limit — elastic limit.
- rational operation — any of the mathematical operations of addition, subtraction, multiplication, and division.
- regional enteritis — Crohn's disease.
- relational algebra — (database, theory) A family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it. The main operations of the relational algebra are the set operations (such as union, intersection, and cartesian product), selection (keeping only some lines of a table) and the projection (keeping only some columns). The relational data model describes how the data is structured.
- rotational latency — (storage, hardware) The time for the start of the required sector on a disk to appear underneath the read/write head. The worst case is where it has just passed the head when the request is received. For a disk drive with N heads per surface, rotating at R revolutions per minute, the average rotational latency will be L = 30/NR seconds. Rotational latency is one component of access time.
- rotational molding — a method for molding hollow plastic objects by placing finely divided particles in a hollow mold that is rotated about two axes, exposing it to heat and then to cold.
- seasonal promotion — Seasonal promotions are items marketed to customers at the appropriate time of year, such as coats in the winter and bathing suits in the summer.
- seasonal variation — season-related variation
- secondary diagonal — a diagonal line or plane.
- self-instructional — pertaining to or constituting learning materials and conditions arranged so that students can proceed to learn on their own with little or no supervision.
- the grand national — an annual steeplechase run at Aintree, Liverpool, since 1839
- the internationale — a revolutionary socialist hymn, first sung in 1871 in France
- traditional option — an option that once purchased cannot be resold
- traditional policy — a life assurance policy in which the policyholder's premiums are paid into a general fund and his or her investment benefits are calculated according to actuarial formulae
- traditional weapon — a weapon having ceremonial tribal significance, such as an assegai or knobkerrie
- unconstitutionally — not constitutional; unauthorized by or inconsistent with the constitution, as of a country.
- unix international — (body) (UI) A consortium including Sun, AT&T and others formed to promote an open environment based on Unix System V, including the Open Look windowing system.
- zion national park — a park in SW Utah. 148 sq. mi. (383 sq. km).