What does "helen" mean?

Any of various papilionid butterflies of the genus Papilio.

What is a synonym for "helen"?

Common synonyms include: helen of troy.

//ˈhɛlən// name, noun

name, noun ·Uncommon ·Advanced level

Noun

1
Any of various papilionid butterflies of the genus Papilio.
"The Yellow Helen […] belongs to a clade of related swallowtail butterflies, the helenus group, or Helens, which are typically large, predominantly black butterflies with long tails and a large, white area on the hindwings."
2
Either of a pair of curved, spine-like appendages on some hyoliths.

Proper Noun

1
The daughter of Zeus and Leda, considered to be the most beautiful woman in the world; her abduction by Paris brought about the Trojan War. Greek, countable, uncountable
"Fools on both sides! Helen must needs be fair, When with your blood you daily paint her thus."
2
A female given name from Ancient Greek. countable, uncountable
""Is her name Ellen or Helen, Miss Viner? I thought —" Miss Viner closed her eyes. "I can sound my h's, dear, as well as anyone, but Helen is not a suitable name for a servant. I don't know what the mothers in the lower classes are coming to nowadays.""
3
A place in the United States:; A minor city in White County, Georgia. countable, uncountable
4
A place in the United States:; An unincorporated community in St. Mary's County, Maryland. countable, uncountable
5
A place in the United States:; A census-designated place in Raleigh County, West Virginia. countable, uncountable