from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of, pertaining to, of having spiracles
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to a spiracle.
from The Century Dictionary and Cyclopedia
- Of or pertaining to a spiracle, breathing-hole, or blow-hole.
- Fitted for or permitting respiration, as a spiracle; respiratory.
- n. A small bone or cartilage in special relation with the spiracle of some fishes.
Sorry, no etymologies found.
P. pt., the palato-pterygoid bar (upper jaw bar). p.s., pre-spiracular ligament, containing a cartilaginous nodule.
In the frog this bar of cartilage is joined directly to the otic capsule by a quadrate portion, but this is only doubtfully represented in the dog-fish by a nodule of cartilage in the pre-spiracular ligament (p.s.).
The dog-fish has ten pairs of cranial nerves, corresponding to the anterior ten of the rabbit very closely, when we allow for the modification the latter has suffered through the conversion of some part of the spiracular cleft to an eardrum, and the obliteration of the post-hyoid branchial slits.
Thus when the pupal cuticle is cast, they are readily broken there, and the cuticle of the midge forming beneath has a spiracular opening into the main air-trunk, ready for use during the insect's aerial life.
Other structural features are the pronotal sulcus, a deep inflection visible externally, and the spiracular lobes, which form protective coverings over the first pair of spiracles (