15-letter words containing h, e, m, t
- ophthalmoscopes — Plural form of ophthalmoscope.
- over-enthusiasm — absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
- overachievement — to perform, especially academically, above the potential indicated by tests of one's mental ability or aptitude.
- oyster mushroom — oyster cap.
- pachymeningitis — inflammation of the dura mater of the brain and spinal cord
- paleolithic man — any of the prehistoric populations of humans, as the Cro-Magnon, living in the late Pliocene and the Pleistocene epochs.
- parasympathetic — pertaining to that part of the autonomic nervous system consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the sympathetic system, as in inhibiting heartbeat or contracting the pupil of the eye.
- parchment paper — a waterproof and grease-resistant paper produced by treating ordinary paper with concentrated sulfuric acid.
- payment holiday — a break taken from paying ( a debt etc) back
- permanent tooth — any of the 32 adult teeth that replace the 20 milk teeth.
- petroleum ether — a volatile mixture of the higher alkane hydrocarbons, obtained as a fraction of petroleum and used as a solvent
- pharmacotherapy — the treatment of disease through the administration of drugs.
- phenomenalistic — the doctrine that phenomena are the only objects of knowledge or the only form of reality.
- phenomenologist — the study of phenomena.
- phonemicization — a grouping of phonemes
- photomechanical — noting or pertaining to any of various processes for printing from plates or surfaces prepared by the aid of photography.
- photomicroscope — a microscope having an illuminator and a camera mechanism for producing a photomicrograph.
- photomultiplier — an extremely sensitive detector of light and of other radiation, consisting of a tube in which the electrons released by radiation striking a photocathode are accelerated, greatly amplifying the signal obtainable from small quantities of radiation.
- phytochemically — in a phytochemical manner
- pilgrim fathers — the Pilgrims (of Plymouth Colony)
- plainclothesman — a police officer, especially a detective, who wears ordinary civilian clothes while on duty.
- plant-hire firm — a company that hires out mobile mechanical equipment for construction, road-making, etc
- platyhelminthes — a phylum of worms having bilateral symmetry and a soft, usually flattened body, comprising the flatworms.
- play the market — to speculate on a stock exchange
- plethysmography — the tracking of changes measured in bodily volume
- pneumatotherapy — the use of compressed or rarefied air in treating disease.
- poikilothermism — the state or quality of being cold-blooded, as fishes and reptiles.
- polyphemus moth — a large, yellowish-brown American silkworm moth, Antheraea polyphemus, having a prominent eyespot on each hind wing and feeding on cherry, apple, and other trees.
- pontine marshes — an area of W Italy, southeast of Rome: formerly malarial swamps, drained in 1932–34 after numerous attempts since 160 bc had failed
- posthemorrhagic — occurring after a haemorrhage
- power macintosh — Power Mac
- primary feather — any of the flight feathers growing from the manus of a bird's wing
- primary teacher — a teacher in a primary school
- protonephridium — a tubular, excretory structure in certain invertebrates, as flatworms, rotifers, and some larvae, usually ending internally in flame cells and having an external pore
- psychochemistry — the treatment of mental illnesses by drugs
- psychotomimetic — (of a substance or drug) tending to produce symptoms like those of a psychosis; hallucinatory.
- pullman kitchen — a kitchenette, often recessed into a wall and concealed by double doors or a screen.
- pulmobranchiate — possessing a pulmobranch
- put sb to shame — If someone puts you to shame, they make you feel ashamed because they do something much better than you do.
- put the make on — to bring into existence by shaping or changing material, combining parts, etc.: to make a dress; to make a channel; to make a work of art.
- quite something — a remarkable or noteworthy thing or person
- raw-pack method — cold pack (def 2).
- refreshment bar — a bar or stall that offers a variety of drinks for sale
- retirement home — care facility for elderly people
- reverend mother — a title of respect or form of address for the Mother Superior of a convent
- rheumatic fever — a serious disease, associated with streptococcal infections, usually affecting children, characterized by fever, swelling and pain in the joints, sore throat, and cardiac involvement.
- rheumatism-root — spotted wintergreen.
- rhyming couplet — a pair of lines in poetry that rhyme and usually have the same rhythm
- roche moutonnee — a rounded, glacially eroded rock outcrop, usually one of a group, resembling a sheep's back.
- rolle's theorem — the theorem that a differentiable function having equal values at the endpoints of an interval has a derivative equal to zero at some point in the interval.