length
measured dimension of an object in a physical space
depth of field
distance between the nearest and the furthest objects that are in focus in an image
equivalent width
measure of spectral lines
Euclidean distance
conventional distance in mathematics and physics
Debye length
measure of a charge carrier's net electrostatic effect in a solution and how far it persists
waterline length
length of a vessel at its nominal waterline
thickness
extent from one surface to the opposite, usually in the smallest solid dimension
Cartesian coordinate
coordinate in a Cartesian coordinate system
depth of focus
lens optics concept
characteristic length
dimension that defines the scale of a physical system
focal length
measure of how strongly an optical system converges or diverges light
semi-minor axis
shortest interval from a point on an ellipse to its center
span
distance between supports of an arch, bridge, etc.
line element
line segment of infinitesimally small length
kinetic chain length
average number of monomer units which are added to an increasing chain during polymerization
stroke length
distance a piston travels in the cylinder of a piston engine
width
horizontal dimension of an entity
diameter
straight line segment that passes through the center of a circle
radius
segment in a circle or sphere from its center to its perimeter or surface and its length
flange focal distance
property of a lens mount system
arc length
property of a curve
depth
vertical distance below the reference surface
overlap
length of railway track left clear beyond a stop signal as a safety measure
word length
number of letters, sounds, syllables, or morphemes in a word
depth
horizontal dimension away from the observer
overhang
horizontal distance between a vehicle's end and its first or last axle
lattice constant
Physical dimensions of unit cells in a crystal
coherence length
distance over which a propagating wave maintains a certain degree of coherence
coherence length
characteristic length in a superconductor
short
low physical length
hydraulic head
specific measurement of liquid pressure above a vertical datum
London penetration depth
distance to which a magnetic field penetrates into a superconductor
path length
physical quantity
spacing
distance between two measurements
semi-major axis
longest interval from a point on an ellipse to its center
wingspan
distance from the tip of one limb such as an arm or wing to the tip of the paired limb, or analogically the same measure for airplane wings
persistence length
mechanical property that characterizes a polymer
bond length
physical quantity in a molecular structure
great-circle distance
shortest distance between two points along the surface of a sphere
radial distance
physical quantity
line length
typographic term
scantling length
measurement of a vessel's hull length
displacement
vector that is the shortest distance from the initial to the final position of a point P
height
distance between the lowest end and highest end of an object
elevation
height of a geographic location above a fixed reference point
inseam length
vertical distance measured from one's bottom of crotch to the floor while standing straight up, or measured from the crotch seam to the bottom of garment for clothing
length over buffers
rail vehicle measurement method