lancelet Meaning, Definition & Usage

  1. noun small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates
    amphioxus.

WordNet

Lance"let noun
Etymology
Lance + -let.
Definitions
  1. (Zoöl.) A small fishlike animal (Amphioxus lanceolatus), remarkable for the rudimentary condition of its organs. It is the type of the class Leptocardia. See Amphioxus, Leptocardia.

Webster 1913