Medical Dictionary
Main Entry:
in·fer·tile Pronunciation:
(')in-'f&rt-&l Function:
adjective : not fertile;
especially : incapable of or unsuccessful in achieving pregnancy over a considerable period of time (as a year) in spite of determined attempts by heterosexual intercourse without contraception <
infertilecouples>
infertile male with a low sperm count> infertile female with blocked fallopian tubes> —compare STERILE 1 —in·fer·til·i·ty /"in-(")f&r-'til-&t-E/ noun plural -ties
[in-fur-tl or, especially Brit., -tahyl] 
tl