from The Century Dictionary and Cyclopedia
- n. The state or quality of being exserted.
Sorry, no etymologies found.
The fact being incontestable, we must evidently admit that the exsertion of the organ is rendered possible only by the expansion of the tracheal vesicles.
A prolonged flight must first expand his two great tracheal sacs; these enormous receptacles being gorged on air will throw back the lower part of the abdomen, and permit the exsertion of the organ.
From the foregoing facts I think we must admit that there exists a perfect gradation in fertility between species which when crossed are quite fertile (as in Rhododendron, Calceolaria, &c.), and indeed in an extraordinary degree fertile (as in Crinum), and those species which never produce offspring, but which by certain effects (as the exsertion of the pollen-tube) evince their alliance.