Types & Characteristics of Genres: Poetry. A main literary genre is poetry. All poems share specific characteristics. For example, poetry is written in lines and stanzas instead of sentences and paragraphs. Some poems follow strict rules as to the number and length of lines and stanzas, whereas many poems are much more free-flowing.
Freebase(0.00 / 0 votes)Rate this definition: Methotrexate. Methotrexate, abbreviated MTX and formerly known as amethopterin, is an antimetabolite and antifolate drug. It is used in treatment of cancer, autoimmune diseases, ectopic pregnancy, and for the induction of medical abortions. It acts by inhibiting the metabolism of folic acid.
Methotrexate is used to treat some cancers of the breast, skin, head and neck, and lungs, along with some leukemias and lymphomas. Methotrexate is a type of antimetabolite. Both healthy and cancerous cells use folate to make DNA and RNA. Methotrexate interferes with this process, helping to stop the reproduction of cells. This drug is especially effective at killing cells that tend to reproduce quickly, a main characteristic of cancer cells.