terrain flight
low level flight | flight at very low altitudes |
dark ground illumination
dark field illumination | a form of microscopic examination of living material by scattered light, specimens appear luminous against a dark background |
blood-oxygenation level dependent functional magnetic resonance imaging
BOLD FMRI | functional magnetic resonance imaging that relies on intrinsic changes in hemoglobin oxygenation |
| 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 |
| miniature illumination | painting or drawing included in a book (especially in illuminated medieval manuscripts) |
| plumb level | a carpenter's level with a plumb line at right angles to it |
| source of illumination | any device serving as a source of visible electromagnetic radiation |
| 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 |
illuminance
illumination | the luminous flux incident on a unit area |
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 |
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 |
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 |
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 |
energy level
energy state | a definite stable energy that a physical system can have, used especially of the state of electrons in atoms or molecules, according to quantum theory only certain energy levels are possible |
pressure
pressure level
force per unit area | the force applied to a unit area of surface, measured in pascals (SI unit) or in dynes (cgs unit), the compressed gas exerts an increased pressure |
| sea-level pressure | the atmospheric pressure reduced by a formula to the pressure at sea level |
ultraviolet
ultraviolet radiation
ultraviolet light
ultraviolet illumination
UV | radiation lying in the ultraviolet range, wave lengths shorter than light but longer than X rays |
poverty line
poverty level | a level of personal income defining the state of poverty |
| support level | (stock market) the price at which a certain security becomes attractive to investors |
| fuel level | the amount of fuel remaining |
| illumination unit | a measure of illumination |
degree level
stage
point | a specific identifiable position in a continuum or series or especially in a process, a remarkable degree of frankness, at what stage are the social sciences? |
| illumination | the degree of visibility of your environment |
grade
level tier | a relative position or degree of value in a graded group, lumber of the highest grade |
| biosafety level | the level of safety from exposure to infectious agents, depends on work practices and safety equipment and facilities |