from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Not connected to the sternum.
- adjective Lacking a sternum.
from The Century Dictionary.
- Having no sternum or breast-bone, as a serpent.
- Not reaching to or connected with the sternum: as, asternal ribs, that is, floating ribs, ribs which do not articulate with the breast-bone.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Anat.) Not sternal; -- said of ribs which do not join the sternum.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective anatomy Not
sternal; said of ribsthat do not join the sternum.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adjective not connected to the sternum or breastbone
from Wiktionary, Creative Commons Attribution/Share-Alike License
In the healthy adult male body, Plate 22, the two lungs, D D*, whilst in their ordinary expanded state, may be said to range over all that region of the trunk of the body which is marked by the sternal and asternal ribs.
These latter organs, although occupying abdominal space, rise to a considerable height behind K L, the asternal ribs, a fact which should be borne in mind when percussing the walls of the thorax and abdomen at this region.
Beneath the umbilicus, N, and on either side of it as far outwards as the lower asternal ribs, K L, thus ranging the abdominal parietes transversely, percussion discovers the transverse colon, O, P, O*.
For when an emphysematous lung shall fully occupy the right thoracic side from B to L, then G, the liver, will protrude considerably into the abdomen beneath the right asternal ribs, and yet will not be therefore proof positive that the liver is diseased and abnormally enlarged.
The liver, in its healthy state and normal proportions, protrudes for an inch (more or less) below the margins of the right asternal ribs.
So true is it that all the costal region (the asternal as well as the sternal) is a pulmonary enclosure, that any instrument which pierces intercostal space must wound the lung.
As the sternal ribs degenerate into the "false" asternal or incomplete ribs from before, obliquely backward down to the last dorsal vertebra, so the thoracic space takes form.