pro·ta·no·pi·a 
(prō′tə-nōpē-ə)
(prō′tə-nōpē-ə)n.
A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.
[PROT(O)- + AN- + -OPIA (from the blindness to red, which is considered the first of the primary colors).]
pro′ta·nopic (-nŏpĭk) adj.
- secondo
- second of arc
- Secondo Tranquillo.
- second person
- second-person
- second quantum number
- second-rate
- second-rateness
- second-rater
- second sight
- second-story man
- second-strike
- second string
- second-string
- second-stringer
- second thought
- second wind
- Second World
- Second-World
- Second World War
- secrecy
- secret
- secreta
- secretagogue
- secretarial