from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Able to swim freely; not sessile or attached: the free-swimming larva of the oyster.
from the GNU version of the Collaborative International Dictionary of English
- adj. Swimming in the open sea; -- said of certain marine animals.
- adj. able to swim about; not attached to a stationary object; -- of aquatic animals.
from The Century Dictionary and Cyclopedia
- Swimming freely: said of any aquatic animal that is not fixed, and particularly of those which are attached at some period of their lives and free at, another: as, the free-swimming embryo of a cirriped; the free-swimming adult of a crinoid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (of animals) able to swim about; not attached
Sorry, no etymologies found.
Their larvae are free-swimming and NOT radially symmetrical.
It wasn't until people started to look at them closely that they saw that they were actually animals they had free-swimming young and they digested.
Fish with fins and scales are generally free-swimming and are found primarily in healthy, flowing water.
The free-swimming y-larvae shed their articulated exoskeleton, and a simple, slug - like, pulsing mass of cells emerged.
More than 700 creatures new to science, ranging from crustaceans and molluscs to carnivorous sponges and free-swimming worms, have been discovered on a series ...
Carnivorous sponges, free-swimming worms, crustaceans, and molluscs living in the Weddell Sea provide new insights into the evolution of ocean life.
Wherever certain species of snails lived, in ditches or ponds or streams, parasitologists came across free-swimming animals that looked like small versions of flukes except that they had great tails attached to their rears.
Turns out the 'mysterious unknown structure' wasn't present in adult sponges, but is a fairly well known structure in free-swimming sponge larvae – the epithelial tissue.
Fertilization of the eggs leads to rapid development, and within about 72 hours a free-swimming larvae is formed.
For example, reproduction in the cryptomonads is asexual and primarily via longitudinal cell division with the cell dividing in either a free-swimming or nonmotile condition.