from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A long flat bone in most vertebrates that is situated along the ventral midline of the thorax and articulates with the ribs. The manubrium of the sternum articulates with the clavicles in humans and certain other vertebrates. Also called breastbone.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The breastbone.
from the GNU version of the Collaborative International Dictionary of English
- n. A plate of cartilage, or a series of bony or cartilaginous plates or segments, in the median line of the pectoral skeleton of most vertebrates above fishes; the breastbone.
- n. The ventral part of any one of the somites of an arthropod.
from The Century Dictionary and Cyclopedia
- n. The breast-bone of man and many other vertebrates; a bone or longitudinal series of bones in the middle line of the ventral aspect of the body, chiefly in its thoracic section, completing the thoracic wall by articulation with more or fewer ribs, or elements of the scapular arch, or both: theoretically, in Owen's system, the hemal spines of a series Of vertebræ.
- n. In arthropods, as insects and crustaceans, a median sternal or ventral sclerite of any somite of the cephalothorax, thorax, or abdomen; a sternite: the opposite of a tergite or notum.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the flat bone that articulates with the clavicles and the first seven pairs of ribs
New Latin, from Greek sternon, breast, breastbone.(American Heritage® Dictionary of the English Language, Fourth Edition)
1660, from Neo-Latin sternum, from Ancient Greek στέρνον (stérnon, "chest, breastbone, heart"), from Proto-Indo-European *stern- (“forehead, chest, side”). Related to Old English steorn ("forehead"), German Stirn ("forehead"). (Wiktionary)