o·pac·i·ty 
(ō-păsĭ-tē)
(ō-păsĭ-tē)n. pl. o·pac·i·ties
1. The quality or state of being opaque.
2. Something opaque.
3.
a. Obscurity; impenetrability.
b. Dullness of mind.
[French opacité, from Old French, from Latin opācitās, from opācus, dark.]
- methyl isocyanate
- methyl methacrylate
- methylnaphthalene
- methylphenidate
- methylprednisolone
- methyl salicylate
- methyltestosterone
- metical
- meticulosity
- meticulous
- meticulously
- meticulousness
- Metis
- metoclopramide
- Metonic cycle
- metonym
- metonymic
- metonymical
- metonymically
- metonymy
- metoo
- me-too
- me-tooer
- me-tooism
- metope