| levallorphan | (noun) drug (trade name Lorfan) that is related to morphine but that counteracts the respiratory depression produced by morphine poisoning but without affecting its analgesic effects | Synonyms: Lorfan |
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| orphan | (noun) a young animal without a mother | - |
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| (noun) the first line of a paragraph that is set as the last line of a page or column | - |
| (noun) a child who has lost both parents | - |
| (noun) someone or something who lacks support or care or supervision | - |
| tryptophan | (noun) an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin | Synonyms: tryptophane |
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