List: rare term

rare term  noun  noun (generic) 

• theism (as refers to the existence of a personal Christian god)

rare term  noun  noun (generic) 

• ablaut, vowel gradation, apophony
• vowel shift

rare term  astronomy  noun  noun (generic) 

• Crux (constellation)

rare term  noun  noun (generic) 

• Greenwich Time

rare term  noun  noun (generic) 

• Greenwich Mean Time, GMT

rare term  noun  noun (generic) 

• sextant

rare term  expression  noun  noun (generic) 

• twelve words used to mark the old calendar as indicators of lucky and unlucky activities

rare term  noun  noun (generic) 

• spring tide

rare term  noun  noun (generic) 

• true bristletail (any insect of order Thysanura, esp. of family Lepismatidae)

rare term  noun  noun (generic) 

• true bristletail (any insect of order Thysanura, esp. of family Lepismatidae)