principal axis
Word Rarity
Rare
Frequency: Zipf frequency 3.90 in modern English
26
Scrabble Score
13
Letters
4
Syllables
9
Unique Chars
Meaning
n
a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted
Example Sentences
- "in a normal eye the optic axis is the direction in which objects are seen most distinctly"