1. Being deepest within the self
   "one's innermost feelings"
   - inmost 
2. Situated or occurring farthest within
   "the innermost chamber"
   - inmost

See also: inner, inward

• 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
• photosynthetic
• phototaxis