amastigophore
From ZooTerms (Dictionary of Invertebrate Zoology)
amastigophore (noun; Greek a, without; mastix, whip; pherein, to bear): (Cnidaria) A nematocyst with no tube beyond the hempe; in microbasic types, the hempe is not more than three times the capsule length; in macrobasic types, the hempe is more than four times the capsule length
See also: mastigophore.
