Dictionary & Thesaurus

1.	(noun) the base of the natural system of logarithms
	Synonyms: 2.718282...
	Related Words: irrational number

2.	(noun) the cardinal compass point that is at 90 degrees
	Synonyms: due east, east
	Related Words: cardinal compass point

3.	(noun) a radioactive transuranic element produced by bombarding plutonium with neutrons
	Synonyms: Es, atomic number 99, einsteinium
	Related Words: metal, metallic element

4.	(noun) a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
	Synonyms: tocopherol, vitamin E
	Related Words: fat-soluble vitamin