Associations to the word «Ortho»

Wiktionary

ORTHO, noun. (chemistry) An isomer of a benzene derivative having two substituents adjacent on the ring
ORTHO, noun. (astronomy) A certain type of flat eyepiece
ORTHO, noun. (photography) (dated) An orthochromatic plate
ORTHO, noun. (imaging) An orthophoto

Wise words

It is better wither to be silent, or to say things of more value than silence. Sooner throw a pearl at hazard than an idle or useless word; and do not say a little in many words, but a great deal in a few.
Pythagoras