diameters

Lines through centers

Diameters is the plural of diameter, the straight line passing through the center of a circle or sphere from one side to the other.

More loosely, diameter refers to the width or thickness of something roughly circular: The tree trunk was three feet in diameter.

In technical contexts, multiple diameters may be measured or compared: The diameters of the pipes varied by application.

Diameter also appears figuratively to suggest the full extent or scope of something.

measurement

calipers

Adjustable-jaw measuring device

millimeters · centimeters · inches · precision · calibration · tolerance · dimensional · sizing · tape · specifications

engineering

machining

Subtractive metalworking process

  • CNCAutomated machining via code
  • latheRotating shaping machine
  • turningAct of rotating

milling · bore · fitting · threading · CAD · blueprint · fabrication · tolerances · mechanical · drilling

geometry

radius

Center-to-perimeter distance

  • circumferenceCircle's outer measurement
  • piCircle's fundamental ratio
  • chordNotes sounded simultaneously

arc · circle · ellipse · tangent · secant · annulus · sector · perimeter · curve · oval

astronomy

planets

Star-orbiting celestial bodies

  • moonsBodies orbiting planets
  • starsLuminous celestial bodies
  • galaxiesGravitationally bound stellar assemblies

nebulae · celestial · angular · apparent · stellar · solar · lunar · planetary · Hubble · telescopes

Categories
Opposites
geometric measurement type

diameterscircumferences

Distances around closed curves

perimeters · peripheries · arcs · boundaries · outlines

linear proportion

diametersradii

Plural of circle's half-diameter

radiuses

Phrases
Family

diameter

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G