terrain flight
low level flight | flight at very low altitudes |
radiotherapy
radiation therapy
radiation actinotherapy
irradiation | (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance |
blood-oxygenation level dependent functional magnetic resonance imaging
BOLD FMRI | functional magnetic resonance imaging that relies on intrinsic changes in hemoglobin oxygenation |
| radiation | the act of spreading outward from a central source |
| Abney level | a surveying instrument consisting of a spirit level and a sighting tube, used to measure the angle of inclination of a line from the observer to the target |
| carpenter's level | a straight bar of light metal with a spirit level in it |
| Dumpy level | a surveyor's level having a short telescope fixed to a horizontally rotating table and a spirit level |
floor level storey
story | a structure consisting of a room or set of rooms at a single position along a vertical scale, what level is the office on? |
ground floor
first floor
ground level | the floor of a building that is at or nearest to the level of the ground around the building |
horizontal surface
level | a flat surface at right angles to a plumb line, park the car on the level |
level
spirit level | indicator that establishes the horizontal when a bubble is centered in a tube of liquid |
level crossing
grade crossing | intersection of a railway and a road on the same level, barriers close road when trains pass |
| mason's level | a level longer than a carpenter's level |
| plumb level | a carpenter's level with a plumb line at right angles to it |
| radiation pyrometer | a pyrometer for estimating the temperature of distant sources of heat, radiation is focussed on a thermojunction connected in circuit with a galvanometer |
| surveyor's level | surveying instrument consisting basically of a small telescope with an attached spirit level rotating around a vertical axis, for measuring relative heights of land |
| water level | a water gauge that shows the level by showing the surface of the water in a trough or U-shaped tube |
luminosity
brightness brightness level
luminance
luminousness
light | the quality of being luminous, emitting or reflecting light, its luminosity is measured relative to that of our sun |
degree
grade
level | a position on a scale of intensity or amount or quality, a moderate grade of intelligence, a high level of care is required, it is all a matter of degree |
| amplitude level | the level on a scale of amplitude |
| signal level | the amplitude level of the desired signal |
noise level
background level | the amplitude level of the undesired background noise |
| intensity strength intensity level | the amount of energy transmitted (as by acoustic or electromagnetic radiation), he adjusted the intensity of the sound, they measured the station's signal strength |
| threshold level | the intensity level that is just barely perceptible |
acoustic power
sound pressure level | the physical intensity of sound |
| acoustic radiation pressure | (acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave |
utmost
uttermost
maximum
level best | the greatest possible degree, he tried his utmost |
| level | height above ground, the water reached ankle level, the pictures were at the same level |
| grade ground level | the height of the ground on which something stands, the base of the tower was below grade |
| water level | the level of the surface of a body of water |
| sea level | level of the ocean's surface (especially that halfway between mean high and low tide), used as a standard in reckoning land elevation or sea depth |
optic radiation
radiatio optica | a nerve pathway from the lateral geniculate body to the visual cortex |
| radiation | a radial arrangement of nerve fibers connecting different parts of the brain |
| Planck's radiation law | (physics) an equation that expresses the distribution of energy in the radiated spectrum of an ideal black body |
level
layer
stratum | an abstract place usually conceived as having depth, a good actor communicates on several levels, a simile has at least two layers of meaning, the mind functions on many strata simultaneously |
| high-level formatting | (computer science) the format for the root directory and the file allocation tables and other basic configurations |
low-level formatting
initialization
initialisation | (computer science) the format of sectors on the surface of a hard disk drive so that the operating system can access them and setting a starting position |
price index
price level | an index that traces the relative changes in the price of an individual good (or a market basket of goods) over time |
| high-level language | a problem-oriented language requiring little knowledge of the computer on which it will be run |
radiation pattern
radiation diagram
pattern | graphical representation (in polar or Cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle |
| background radiation | radiation coming from sources other than those being observed |
| radiation | the spread of a group of organisms into new habitats |
| adaptive radiation | the development of many different forms from an originally homogeneous group of organisms as they fill different ecological niches |
waterline
water line
water level | a line corresponding to the surface of the water when the vessel is afloat on an even keel, often painted on the hull of a ship |
water table
water level
groundwater level | underground surface below which the ground is wholly saturated with water, spring rains had raised the water table |
actinic radiation
actinic ray | electromagnetic radiation that can produce photochemical reactions |
alpha radiation
alpha ray | the radiation of alpha particles during radioactive decay |
beta radiation
beta ray
electron radiation | radiation of beta particles during radioactive decay |
black-body radiation
blackbody radiation | the electromagnetic radiation that would be radiated from an ideal black body, the distribution of energy in the radiated spectrum of a black body depends only on temperature and is determined by Planck's radiation law |
| ionizing radiation | high-energy radiation capable of producing ionization in substances through which it passes |