phase space | (physics) an ideal space in which the coordinate dimensions represent the variables that are required to describe a system or substance, a multidimensional phase space |
phase I clinical trial phase I | a clinical trial on a few persons to determine the safety of a new drug or invasive medical device, for drugs, dosage or toxicity limits should be obtained |
phase II clinical trial phase II | a clinical trial on more persons than in phase I, intended to evaluate the efficacy of a treatment for the condition it is intended to treat, possible side effects are monitored |
phase III clinical trial phase III | a large clinical trial of a treatment or drug that in phase I and phase II has been shown to be efficacious with tolerable side effects, after successful conclusion of these clinical trials it will receive formal approval from the FDA |
phase IV clinical trial phase IV | sometimes the FDA approves a drug for general use but requires the manufacturer to continue to monitor its effects, during this phase the drug may be tried on slightly different patient populations than those studied in earlier trials |
preclinical trial preclinical test preclinical phase | a laboratory test of a new drug or a new invasive medical device on animal subjects, conducted to gather evidence justifying a clinical trial |
positron emission tomography PET | using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain) |
phase-out | the act or instance of a planned discontinuation |
emission emanation | the act of emitting, causing to flow forth |
Bessemer converter | a refractory-lined furnace used to convert pig iron into steel by the Bessemer process |
catalytic converter | a converter that uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water, an antipollution device on an automotive exhaust system |
catalytic cracker cat cracker | a chemical reactor for converting oils with high boiling points into fuels with lower boiling points in the presence of a catalyst |
converter convertor | a device for changing one substance or form or state into another |
data converter | converter for changing information from one code to another |
digital-analog converter digital-to-analog converter | device for converting digital signals into analogue signals |
digitizer digitiser analog-digital converter analog-to-digital converter | device for converting analogue signals into digital signals |
electrical converter | converter that converts alternating current into direct current or vice versa |
electronic converter | (telecommunication) converter for converting a signal from one frequency to another |
exhaust exhaust system | system consisting of the parts of an engine through which burned gases or steam are discharged |
exhaust fan | a fan that moves air out of an enclosure |
exhaust manifold | a manifold that receives exhaust gases from the cylinders and conducts them to the exhaust pipe |
exhaust pipe | a pipe through which burned gases travel from the exhaust manifold to the muffler |
exhaust valve | a valve through which burned gases from a cylinder escape into the exhaust manifold |
field-emission microscope | electron microscope used to observe the surface structure of a solid |
hood exhaust hood | metal covering leading to a vent that exhausts smoke or fumes |
positron emission tomography scanner PET scanner | a tomograph that produces cross-sectional Xays of metabolic processes in the body |
synchronous converter rotary rotary converter | electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa |
torque converter | converter for transmitting and amplifying torque (especially by hydraulic means) |
phase | (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun), the full phase of the moon |
phase modulation PM | modulation of the phase of the carrier wave |
emission | the occurrence of a flow of water (as from a pipe) |
emission spectrum | spectrum of electromagnetic radiation emitted by a self-luminous source |
infrared infrared light infrared radiation infrared emission | electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves |
radio wave radio emission radio radiation | an electromagnetic wave with a wavelength between . cm to , m |
discharge emission expelling | any of several bodily processes by which substances go out of the body, the discharge of pus |
emission | the release of electrons from parent atoms |
field emission | the emission of electrons that are stripped from parent atoms by a high electric field |
nocturnal emission | ejaculation during sleep (usually during a dream) |
phase change phase transition state change physical change | a change from one state (solid or liquid or gas) to another without a change in chemical composition |
phase of cell division | a stage in meiosis or mitosis |
photoelectric emission | the release or absorption of quanta above a certain energy level |
secondary emission | the emission of electrons from a surface that is bombarded by higher energy primary electrons |
thermionic emission thermal emission | the emission of electrons from very hot substances |
phase form | (physical chemistry) a distinct state of matter in a system, matter that is identical in chemical composition and physical state and separated from other material by the phase boundary, the reaction occurs in the liquid phase of the system |
dispersed phase dispersed particles | (of colloids) a substance in the colloidal state |
dispersing phase dispersion medium dispersing medium | (of colloids) a substance in which another is colloidally dispersed |
exhaust exhaust fumes fumes | gases ejected from an engine as waste products |
discharge emission | a substance that is emitted or released |
greenhouse gas greenhouse emission | a gas that contributes to the greenhouse effect by absorbing infrared radiation |
anal stage anal phase | (psychoanalysis) the second sexual and social stage of a child's development during which bowel control is learned |