The root word “Photo” quite means “Light”. All the uses that “Photo” gets in the words that are derived from it involve, in one way or another, light. The word sees a lot of use in technical, science-oriented fields, but also in regular day to day life.
This ROOT-WORD is PHOTO which means LIGHT. It comes from the Greek, phos, photos. This Root is very much involved in PHOTOgraphy of all kinds; so much, in fact, that we think the word PHOTO means PICTURE.
Any word that uses “Photo” as its root word, therefore, is referring to light, either directly or indirectly. The root word “Photo” sees a lot of use as a prefix (meaning that it gets put in front of the derived word) for a lot of words.
Photo is the root-word for many other words. This ROOT-WORD is PHOTO which means LIGHT. It comes from the Greek, phos, photos. This Root is very much involved in PHOTOgraphy of all kinds; so much, in fact, that we think the word PHOTO means PICTURE. We have completely forgotten the LIGHT without which there can be no picture.
word-forming element meaning “light” or “photographic” or “photoelectric,” from Greek photo-, combining form of phōs (genitive phōtos) “light” (from PIE root *bha- (1) “to shine”). *bhā-, Proto-Indo-European root meaning “to shine.”
The word PHOTON (No.9) will help us. A PHOTON is a unit of light intensity, and pictures are taken with that aid. 1. Photobiotic : PHOTO biotic (fote o bie ot’ ik) adj. Requiring light to live 2. Photochromy : PHOTO chromy (foe’ to kro mi) n. Color photography 3. Photodromy : PHOTO dromy (foe’ to kro mi) n. Movement in the direction of light 4.
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