dry·as·dust or dry-as-dust 
(drīəz-dŭst′)
(drīəz-dŭst′)n.
A dull, pedantic speaker or writer.
[After Dr. Jonas Dryasdust, a fictitious character to whom Sir Walter Scott dedicated some of his novels.]
dryas·dust′ adj.
- posterboard
- poster boy
- poster child
- poster color
- poste restante
- poster girl
- posterior
- posterior chamber
- posteriority
- posteriorly
- posterity
- postern
- poster paint
- Post Exchange
- postexilian
- postexilic
- post-feminism
- post-feminist
- postfix
- postfixal
- postfixial
- postfrontal
- postganglionic
- postglacial
- postgraduate