Wordnet 3.0
NOUN (1)
1.
any of the deeper and thicker fascia that attach muscles to bones;
resemble flattened tendons;
The Collaborative International Dictionary of English v.0.48:
Aponeurosis \Ap`o*neu*ro"sis\, n.; pl. Aponeuroses. [Gr. ?,
fr. ? to pass into a tendon; ? from + ? to strain the sinews,
? sinew, tendon, nerve.] (Anat.)
Any one of the thicker and denser of the deep fasci[ae] which
cover, invest, and the terminations and attachments of, many
muscles. They often differ from tendons only in being flat
and thin. See Fascia.
[1913 Webster]
WordNet (r) 3.0 (2006):
aponeurosis
n 1: any of the deeper and thicker fascia that attach muscles to
bones; resemble flattened tendons