periscii
n. the inhabitants of the polar circles: so called because in summer their shadows revolve around them

antiscians
n. people who live on the same meridian but on opposite sides of the equator, so that their shadows at noon fall in opposite directions

perioeci
n. people who live at the same latitude but on opposite meridians, so that noon for one is midnight for the other

burgh-bote
n. a tax for the repair of fortresses

undoctor
v. to make unlike a doctor, to degrade a doctor

andabatarian
adj. struggling while blindfolded

ambilevous
adj. “left-handed on both sides”; clumsy

polysemant
n. a word having more than one meaning

In 1000 Most Obscure Words, lexicographer Norman Schur notes that the Oxford English Dictionary gives three strikingly different definitions for rosmarine:

rosemary
sea spray
the walrus

Similarly, merkin manages to mean both “an artificial covering of hair for the female pubic region” and “a mop to clean cannon.” Kudos.

In 1973, textile merchant Marcus Shloimovitz sued the Oxford Dictionary for defining Jew in part as “a grasping or extortionate money-lender or usurer.” “The Jewish race includes sages, scholars, judges, scientists and people from the arts and stage,” he argued. “They have done great service for their countries. They are not cheats or unscrupulous usurers.” He lost because he failed to show that the definition had caused him personal suffering.

eriff
n. a two-year-old canary

plagose
adj. fond of flogging

baculine
adj. pertaining to punishment by flogging

mastigophorous
adj. carrying a whip