Hypertext Webster Gateway: "trigone"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Trigone \Tri`gone"\, n. [F., literally, a trigon.] (Anat.)
A smooth triangular area on the inner surface of the bladder,
limited by the apertures of the ureters and urethra.
Additional Hypertext Webster Gateway Lookup
Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents;
see the Webster Gateway FAQ,
and also the Back-end/database links and credits.