Prader-Willi syndrome is caused by a missing gene on chromosome 15. Normally, parents each pass down a copy of this chromosome. The defect can occur in a couple of ways: The father's genes are missing on chromosome 15; There are defects or problems with the fatherâs genes on chromosome 15
poison meaning, definition, what is poison: a substance that can make people or animals ill or kill them if they eat or drink it: . Learn more.
Princeton's WordNet (0.00 / 0 votes) Rate this definition: secret (noun). something that should remain hidden from others (especially information that is not to be passed on). the combination to the safe was a secret; he tried to keep his drinking a secret.