### line:

Red line
* appear wherever tentacles have touched the skin, and welts usually follow.
  - streamlines, or directions of maximum dip, calculated by the visualization program
  - trains
* refer to bus lines.
* show how the molecules are paired.

Shroud
* are lines
  - part of parachutes
  - stays
* cover the belts and motors for safety.
* have no pockets.

### line:

Solid line
* are isobars and represent the pressure fields
  - linear regressions through the origin
  - the sight-lines to the three background QSOs
  - to guide the eye
* indicate measuring the angles the two sides make with the base line.
* indicates presence, and dotted line absence, of interaction between two cells.
* is the linear regression line of all data points
  - transverse magnetization
* represent electrons while dashed lines represent photons
  - lines of equal salinity
  - the direction of the magnetic field
* show the transmission of filters and lenses.
* shows the measured transmission of radiation by wave number.

Spectra line
* high strength, low stretch line used only with stunt kites.
* is super thin, super strong and has minimal stretch.

Spectral line
* Many spectral lines vary in intensity.
* Some spectral lines are very important in astrophysics.
* are produced by transitions of electrons within atoms or ions.
* have very precisely known wavelengths.
* result from discrete changes in the energy of an atom or molecule
  - movement of atom's electron from an excited state to ground state
* show up as dark, vertical bands
* tell astronomers what atoms and molecules are present and how much of each there is.

Straight line
* Every straight line has a slope.
* Know simple properties of quadratic functions.
* are characteristic of types or periods of furniture
  - manifolds
  - paths of shortest distance
  - the shortest distance between two points
* can help emphasize an angled plane in drawings that have depth.
* have constant slope.
* joining sun and planet sweeps out equal areas in equal intervals of time.

### line | straight line:

Asymptote
* are lines on a graph which the graph gets very close to, but never touches.
* straight line

Tangent
* Creates a surface tangent to two adjacent surfaces.
* are straight lines
  - trigonometric functions
* can attach themselves to any transition.
* comes from the Latin word tangere , to touch.
* geometry term used to describe a direction that are related to the slope of a curve.
* is the ratio of the opposite to the adjacent sides of any right triangle.

Thin line
* are a problem on screens of low contrast
  - isentropic or constant potential temperature surfaces labelled in Kelvins
  - model predictions
* represent the self-diffusion coefficients of iron.
* tend to disappear when the cup melts.

### line:

Vertical line
* add movement and energy to an image.
* are P-E bonds and horizontal lines are hydrogen bonds
  - problematic in that there is no change in x
  - the formal lines of communication
  - trading signals
* correspond to the positions of the marker proteins during electrophoresis.
* crossing the spectrum are emission from the night sky.
* force the eye up and down, and consequently lend a taller, slimmer effect.
* have an infinite slope.
* measure amplitude or voltage and is measured in millivolts.
* represent pairs of homologous chromosomes.

Waterline
* Is where the water meets the hull of a vessal when it floating or positively bouyant.
* denotes the water surface level remote from the hull.