shaped like a dart
member of an extinct group of cephalopods, animals related to the modern squid and octopus but possessing a large internal shell, that first appeared ... [1 related articles]
Dart-shaped. ... Origin: G. Belemnon, a dart, + eidos, resemblance ... (05 Mar 2000) ... 
(bә-lem´noid) dart-shaped. the styloid process.
Type: Term Pronunciation: be-lem′noyd Definitions: 1. Dart-shaped.
A group of extinct cephalopod molluscs with an elongate, tapering body and an internal shell. They probably looked rather like squid or cuttle fish. The rear part of the bullet-shaped, cylindrical shell is known as the rostrum and has a conical cavity in the wide end into which fits a small conical structure called the phragmacone. This is divided ...