12-letter words containing a, p, e, r, i
- oligospermia — (medicine) Low volume of semen.
- open primary — a direct primary election in which voters need not meet a test of party membership.
- open trailer — any dog that barks or bays on the trail of its quarry.
- opera singer — a professional singer of opera
- opera window — a narrow, fixed window on each side of the rear passenger compartment of an automobile.
- operatically — of or relating to opera: operatic music.
- operationism — the doctrine that the meaning of a scientific term, concept, or proposition consists of the operation or operations performed in defining or demonstrating it.
- operatorship — (in the oil and gas industries) the right to operate a well, field, or other oil source.
- opinionnaire — A form containing a list of statements, each of which the members of a selected group are asked to endorse or reject; the purpose being to gather information for a survey.
- oppressional — Exhibiting or relating to oppression.
- optical grep — vgrep
- optometrical — the practice or profession of examining the eyes, by means of suitable instruments or appliances, for defects in vision and eye disorders in order to prescribe corrective lenses or other appropriate treatment.
- 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.
- organoleptic — perceived by a sense organ.
- 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.
- outspreading — Present participle of outspread.
- over-explain — to make plain or clear; render understandable or intelligible: to explain an obscure point. Synonyms: explicate. Antonyms: confuse.
- overcapacity — capacity beyond what is normal, allowed, or desirable.
- overemphasis — excessive or undue emphasis.
- overemphatic — excessive or undue emphasis.
- overplanning — the act or instance of planning excessively
- overtime pay — a higher than normal rate of pay, for work done as overtime
- pacific rose — a large variety of eating apple from New Zealand, with sweet flesh
- 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
- page printer — Computers. a high-speed, high-resolution printer that uses a light source, as a laser beam or electrically charged ions, to print a full page of text or graphics at a time.
- pain barrier — If you say that a sports player has gone through the pain barrier, you mean that he or she is continuing to make a great effort in spite of being injured or exhausted.
- paint bridge — a structure spanning and providing passage over a river, chasm, road, or the like.
- paint roller — a roller of absorbent material, mounted on a handle, that is rolled in a trough of paint and then rolled over a flat surface to be painted.
- pakeha māori — (in the 19th century) a European who adopted the Māori way of life
- paleoliberal — a person advocating a more extreme form of liberalism, especially in politics.
- pan-american — of, relating to, or representing all the countries or people of North, Central, and South America.
- pancreatitis — inflammation of the pancreas.
- panspermatic — relating to panspermia
- panty girdle — women's control pants
- paper napkin — a napkin or serviette made from tissue paper
- paper profit — an unrealized profit due to the appreciation of something owned but not yet sold.
- paper-weight — a small, heavy object of glass, metal, etc., placed on papers to keep them from scattering.
- paperhanging — the activity or business of a paperhanger.
- papier colle — collage.
- papier-mache — a substance made of pulped paper or paper pulp mixed with glue and other materials or of layers of paper glued and pressed together, molded when moist to form various articles, and becoming hard and strong when dry.
- pappenheimer — a heavy rapier of the 17th century, having a swept guard with two perforated plates.
- para-medical — related to the medical profession in a secondary or supplementary capacity.
- paracentesis — puncture of the wall of a cavity to drain off fluid.
- paradoxurine — relating to the palm civet
- paraesthesia — an abnormal sensation, as prickling, itching, etc.
- paraesthetic — paresthesia.
- paralipomena — Chronicles.