from the GNU version of the Collaborative International Dictionary of English
- n.pl. An order of fishes without ventral fins, including the eels.
- n.pl. A group of holothurians destitute of suckers. See apneumona.
from The Century Dictionary and Cyclopedia
- An order of fishes to which very different limits have been assigned.
- In De Blainville's system of classification, a division of his Entomozoaria; the apodal, as distinguished from the chætopod, entomozoans.
Sorry, no etymologies found.
There are certain birds, Theotimus, which Aristotle calls apodes,  because having extremely short legs, and feeble feet, they use them no more than if they had none.
So the wind, having seized upon and raised our apodes, will not bear them very far unless they display their wings and co-operate, raising themselves aloft and flying in the air, into which they have been lifted.
The wind that raises the apodes blows first upon their feathers, as the parts most light and most susceptible of its agitation, by which it gives the beginning of motion to their wings, extending and displaying them in such sort that they give a hold by which to seize the bird and waft it into the air.
But a clergyman, of an inquisitive turn, assures me, that when he was a great boy, some workmen, in pulling down the battlements of a church tower early in the spring, found two or three swifts (_hirundines apodes_) among the rubbish, which were at first appearance dead, but on being carried towards the fire revived.