Ecthoreum \Ec`tho*re"um\, n.; pl. {Ecthorea}. [NL., fr. Gr. ? to
leap out; ek out + ?, ?, to leap, dart.] (Zo["o]l.)
The slender, hollow thread of a nettling cell or cnida. See
{Nettling cell}. [Written also {ecthor[ae]um}.]
[1913 Webster]