2) reproductive system. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...The bodily system of gonads, associated ducts, and external genitals concerned with sexual reproduction....

3) dysgenesis. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...Defective or abnormal development of an organ, especially of the gonads....

4) gonadotropin. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...A hormone that stimulates the growth and activity of the gonads, especially any of several pituitary hormones that stimulate the function of the ovaries and testes....

5) activin. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...A polypeptide growth factor that is synthesized in the pituitary gland and the gonads and stimulates the secretion of follicle stimulating hormone. activ(ate) + (inhib)in...

6) spermatogonium. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...Inflected forms: pl. sperˇmatˇoˇgoˇniˇa (-n-) Any of the cells of the gonads in male organisms that are the progenitors of spermatocytes. New Latin : spermato- +...

7) pangenesis. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...gemmules containing hereditary information from every part of the body coalesce in the gonads and are incorporated into the reproductive cells. pangeˇnetic (-j-netik)...

8) endocrine gland. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...the thyroid, parathyroids, anterior and posterior pituitary, pancreas, adrenals, pineal, and gonads. Also called ductless gland....

9) castrate. The American HeritageŽ Dictionary of the English Language: Fourth Edition. 2000.
...who is incapable of reproduction as a result of removal, destruction, or inactivation of the gonads. Latin castrre, castrt-. See kes- in Appendix I.castratˇer, castraˇtor...