perforator
A tool or machine that makes holes, or perforates, materials such as paper and card.
A machine that can bore a tunnel underground
A perforating artery or vein

perforators
plural of perforator

periaktoi
plural of periaktos

pericam
A fluorescent chimeric protein composed of a circularly permuted green fluorescent protein fused to calmodulin

pericams
plural of pericam

perigraph
An instrument for measuring a person's ability to flex the neck and limbs.
A careless or inaccurate delineation of anything.

perigraphs
plural of perigraph

perikyma
Any of the pits around the long prisms of tooth enamel, indicating the places where enamel-producing cells used to make contact with neighbouring cells.

perikymata
plural of perikyma

perilene
Alternative spelling of perylene.

perimidine
A tricyclic heterocycle consisting of a dihydri-pyrimidine ring ortho- and peri-fused to naphthalene

perimidines
plural of perimidine

perineometer
An instrument for measuring the strength of voluntary contractions of the pelvic floor muscles.

perineometers
plural of perineometer

perioscope
A form of endoscope used to explore and visualize the periodontal pocket, producing an image of a diseased tooth's root.

perioscopes
plural of perioscope

periostraca
plural of periostracum

peripheral
On the periphery or boundary.
Beside the point.
Unimportant.
Auxiliary.
Related to or located in the peripheral nervous system.

peripherals
plural of peripheral

perloir
An instrument for making bead-shaped ornaments.

perloirs
plural of perloir

permeameter
A device used to measure the permeability of a fluid (e.g., water) through a porous material.
An instrument used to measure the electromagnetic permeability of a material.

permeameters
plural of permeameter

permeator
A device, containing a semipermeable membrane, used to desalinate water by reverse osmosis

permeators
plural of permeator

permiss
A choice that has been permitted.
A rhetorical device in which a thing is predicated on the decision of one's opponent.

permisses
plural of permiss

pernambuco
The wood of Paubrasilia echinata.

perrier
A short mortar used for throwing stone shot.

perriers
plural of perrier

persons
plural of person, used to refer to them individually, rather than as a group; contrast people

perspectograph
An instrument for obtaining, and transferring to a picture, the points and outlines of objects, so as to represent them in their proper geometrical relations as viewed from a single point.

perspectographs
plural of perspectograph

perspectometer
An instrument used in making perspective drawings, eliminating the need for construction of the squares on the perspective when applying the method of squares.

perspectometers
plural of perspectometer

persuader
One who, or that which, persuades, literally or figuratively.
One who, or that which, persuades, literally or figuratively.
One who, or that which, persuades, literally or figuratively.
One who, or that which, persuades, literally or figuratively.
One who, or that which, persuades, literally or figuratively.

persuaders
plural of persuader

perylene
A polycyclic aromatic hydrocarbon consisting of two molecules of naphthalene fused together; it is used in light-emitting diodes.

perylenes
plural of perylene

pessaries
plural of pessary

pessary
A medical device similar to the outer ring of a contraceptive diaphragm, most commonly used to support a displaced uterus; also called therapeutic pessary.
A diaphragm or cervical cap.
A vaginal suppository.

petasii
plural of petasius

petasius
A large broad-rimmed bell used for summoning monks.

petcock
A small valve, spout, or faucet operated by hand, usually used to release pressure or drain fluid.

petcocks
plural of petcock

peterero
Alternative form of pederero.

petereroes
plural of peterero

petereros
plural of peterero

petextrian
A pedestrian who texts or otherwise uses a mobile device while walking.

petri
Ellipsis of petri dish.

petriplate
Synonym of Petri dish.

petroboloi
plural of petrobolos

petrobolos
A kind of catapult of Ancient Greece, used for hurling stones.

petroplinthite
A petroplinthic soil, traditionally used to make bricks

petroplinthites
plural of petroplinthite

pettitoe
A pig's foot used for eating

phablet
A mobile device intermediate in size between smartphone and tablet.

phablets
plural of phablet

phacoemulsifier
A device used in phacoemulsification surgery

phacoemulsifiers
plural of phacoemulsifier

phacoidoscope
Alternative form of phacoscope.

phacoidoscopes
plural of phacoidoscope

phacometer
A device for testing the refractive power of lenses.

phacometers
plural of phacometer

phacoscope
An instrument in the form of a dark chamber for observing the changes in the crystalline lens during accommodation.

phacoscopes
plural of phacoscope

phad
A cloth or canvas scroll used for phad painting

phads
plural of phad

phagodynamometer
An instrument that measures the force required to crush a given food in masticating.

phagodynamometers
plural of phagodynamometer

phakometer
Alternative form of phacometer.

phakometers
plural of phakometer

phakoscope
Alternative spelling of phacoscope.

phakoscopes
plural of phakoscope

phallin
Any of several haemolytic cyclic oligopeptides present in the death cap toadstool, Amanita phalloides.

phalline
Alternative form of phallin.

phallins
plural of phallin

phallometer
An instrument for measuring the penis.

phallometers
plural of phallometer

phantasmograph
An apparatus for printing magic-lantern slides, consisting of a long box, at one end of which the quarter-plate negative and the lantern plate in contact with it are placed.

phantasmographs
plural of phantasmograph

phantastikons
plural of phantastikon

phantastron
An electronic device that generates a series of pulses

phantastrons
plural of phantastron

phare
beacon
lighthouse

phares
plural of phare

pharmacoperone
A pharmacological chaperone (protein) that is used for drug delivery

pharmacoperones
plural of pharmacoperone

pharyngoesophagoscope
An esophagoscope that may also be used to examine the pharynx

pharyngoesophagoscopes
plural of pharyngoesophagoscope

pharyngometer
A device used in pharyngometry.

pharyngometers
plural of pharyngometer

pharyngoscope
An instrument used to examine the pharynx.

pharyngoscopes
plural of pharyngoscope

pharyngotome
An instrument for incising or scarifying the tonsils, etc.

pharyngotomes
plural of pharyngotome

phasemeter
A device for measuring the difference in phase of two alternating currents of electromotive forces.

phasemeters
plural of phasemeter

phaseometer
Alternative form of phasemeter.

phaseometers
plural of phaseometer

phasitron
An electromechanical device once used to modulate the phase of a signal

phasitrons
plural of phasitron

phasometer
Alternative form of phasemeter.

phasometers
plural of phasometer

phedinkus
Nonsense, malarkey

phenakistiscope
Alternative form of phenakistoscope.

phenakistiscopes
plural of phenakistiscope

phenakistoscope
An early animation device consisting of a disc or drum which rotated, showing successive images through slits, often via a mirror, thus producing the illusion of motion.

phenakistoscopes
plural of phenakistoscope

phenalene
A tricyclic hydrocarbon consisting of a cyclohexene ring ortho- and peri-fused to naphthalene

phenalenes
plural of phenalene

phenanthro
phenanthrene fused to another ring

phenanthropyran
Any heterocycle consisting of a phenanthrene ring system fused to that of a pyran

phenanthropyrans
plural of phenanthropyran

phenarsazinine
A tricyclic heterocycle consisting of two benzene rings fused to arsazine

phenarsazinines
plural of phenarsazinine

phenazine
any of a class of aromatic tricyclic heterocycles used to make dyestuffs

phenazines
plural of phenazine

phendimetrazine
A particular drug used for weight loss, metabolized by the body into phenmetrazine.

phenocopiers
plural of phenocopier