Found in the following dictionaries
SOWPODS (Collins Scrabble Words)
"Smoot" Definition
noun
A small opening built into a dry-stone wall as a bolthole allowing a person to cross the wall while impeding the livestock.
Source: Wiktionary
Defined as exactly sixty-seven inches; equal to approximately 1.70 meters.
Source: Wiktionary
biographical name
George F(itzgerald) 1945– Am. astrophysicist.
Source: Merriam-Webster