Collins Concise English Dictionary © HarperCollins Publishers::
plano-, (sometimes before a vowel) plan- combining form
  1. indicating flatness or planeness: plano-concave
Etymology: from Latin plānus flat, level
WordReference Random House Unabridged Dictionary of American English © 2026
pla•no  (plānō),USA pronunciation adj. 
  1. Ophthalmologypertaining to eyeglasses that do not contain a curvature for correcting vision defects:plano sunglasses.
  • independent use of plano-1 1945–50

Pla•no  (plānō),USA pronunciation n. 
  1. Place Namesa town in N Texas. 72,331.

plano-1 ,
  1. a combining form meaning "flat,'' "plane,'' used in the formation of compound words:planography.
Also, plani-;
 
[esp. before a vowel,] plan-. 
  • combining form representing Latin plānus level, plānum level ground

plano-2 ,
  1. a combining form meaning "moving,'' "capable of movement,'' used in the formation of compound words:planogamete.
  • combining form representing Greek plános wandering, roaming. See planet

'plano-' also found in these entries (note: many are not synonyms or translations):

Forum discussions with the word(s) "plano-" in the title:


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