A drug designed to treat Alzheimer's disease.

plural of proctodaeum

A village and civil parish in South Kesteven district, Lincolnshire, England (OS grid ref TF0607). / A village in Vale of White Horse district, Oxfordshire, England (OS grid ref SU3089).

A thermionic valve similar to a tetrode with the addition of a third grid, the suppressor grid to reduce the secondary emission effect; was/is used in high quality audio and radio products.