1. Being precise with regard to a prescribed or specified criterion
   "the prediction for snow was right on the button"
   - on the nose

1. Just as it should be
   - precisely, exactly, on the nose, on the dot

See also: precise

• photomontage
• photomosaic
• photomultiplier
• photon
• photoperiodism
• photophobia
• photophore
• photopic
• photopic vision
• photopigment
• photoplate making
• photoreceptor
• photoretinitis
• photosensitise
• photosensitive
• photosensitivity
• photosensitize
• photoshop
• photosphere
• photospheric
• photostat
• Photostat machine
• photosynthesis
• photosynthesise
• photosynthesize