12-letter words containing a, r, i, d
- opera window — a narrow, fixed window on each side of the rear passenger compartment of an automobile.
- orbital road — a highway that circles a metropolitan area; ring road
- orchidaceous — belonging to the plant family Orchidaceae.
- orchidomania — an obsession with or passion for orchids
- ordered pair — Mathematics. two quantities written in such a way as to indicate that one quantity precedes or is to be considered before the other, as (3, 4) indicates the Cartesian coordinates of a point in the plane.
- ordinariness — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
- ordinary lay — the form of lay found in a cable-laid rope
- ordinary ray — Optics, Crystallography. the part of a doubly refracted ray whose velocity within a crystal is the same in any direction.
- organic mode — (programming) A term used by COCOMO to describe a project that is developed in a familiar, stable environment. The product is similar to previously developed products. Most people connected with the project have extensive experience in working with related systems and have a thorough understanding of the project. The project contains a minimum of innovative data processing architectures or algorithms. The product requires little innovation and is relatively small, rarely greater than 50,000 DSIs.
- orthopaedics — (used with a singular verb) the medical specialty concerned with correction of deformities or functional impairments of the skeletal system, especially the extremities and the spine, and associated structures, as muscles and ligaments.
- orthopaedist — Alternative spelling of orthopedist.
- orthopedical — (American spelling) Alternative form of orthopaedical.
- orthovanadic — relating to orthovanadates
- outsider art — art produced by untutored artists working by themselves and for themselves
- outspreading — Present participle of outspread.
- overachieved — Simple past tense and past participle of overachieve.
- overdelicate — extremely or excessively delicate: an overdelicate digestive system.
- overdiagnose — (medicine) To diagnose something more often than it actually occurs.
- overdominant — excessively dominant
- overdrafting — the removal of more water from ground and surface basins than is replaced by rain and melting snow.
- overdramatic — of or relating to the drama.
- overfatigued — excessively fatigued
- overidealize — to idealize excessively
- overmedicate — to treat with medicine or medicaments.
- oversedation — the calming of mental excitement or abatement of physiological function, especially by the administration of a drug.
- overstrained — exerted, taxed, or used to an excessive extent
- packet radio — (communications, radio) The use of packet switched communications protocols in large networks (i.e not wireless LANs or Bluetooth) having wireless links to terminals at least. Packet radio is split into amateur packet radio (AX25) and General Packet Radio Service (GRPS).
- paedomorphic — showing signs of paedomorphism
- paint bridge — a structure spanning and providing passage over a river, chasm, road, or the like.
- palindromist — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
- panty girdle — women's control pants
- para-medical — related to the medical profession in a secondary or supplementary capacity.
- paradigmatic — of or relating to a paradigm.
- paradisaical — paradisiacal.
- paradisiacal — of, like, or befitting paradise.
- paradoxidian — relating to the genus Paradoxides
- paradoxurine — relating to the palm civet
- parascending — parasailing
- parasiticide — an agent or preparation that destroys parasites.
- parasphenoid — a bone next to the sphenoid bone in the skull of some animals
- participated — to take or have a part or share, as with others; partake; share (usually followed by in): to participate in profits; to participate in a play.
- particolored — having different colors in different areas or patches; variegated: a parti-colored dress.
- pas de trois — a dance for three dancers.
- peabody bird — the white-throated sparrow.
- pearl diving — the act of diving for the precious gems pearls
- pediatrician — a physician who specializes in pediatrics.
- pedicellaria — one of the minute pincerlike structures common to starfish and sea urchins, used for cleaning and to capture tiny prey.
- pencil cedar — the red cedar, Juniperus virginiana, or its wood.
- pentacrinoid — a larval crinoid resembling members of the genus Pentacrinus
- pepys' diary — a diary kept by Samuel Pepys from January 1, 1660 to May 31, 1669, in which are recorded his impressions of contemporary London life, the life of the court, and the administration of the navy.