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  1. Deletion - National Human Genome Research Institute

    3 days ago · A deletion, as related to genomics, is a type of mutation that involves the loss of one or more nucleotides from a segment of DNA. A deletion can involve the loss of any number of …

  2. DELETION Definition & Meaning - Merriam-Webster

    The meaning of DELETION is the act of deleting.

  3. Deletion (genetics) - Wikipedia

    In genetics, a deletion (also called gene deletion, deficiency, or deletion mutation) (sign: Δ) is a mutation (a genetic aberration) in which a part of a chromosome or a sequence of DNA is left out during DNA …

  4. DELETION Definition & Meaning | Dictionary.com

    DELETION definition: an act or instance of deleting. See examples of deletion used in a sentence.

  5. What Is a Deletion in Genetics and How Does It Happen?

    Jan 12, 2026 · A deletion in genetics is a mutation where one or more nucleotide base pairs are lost from a DNA sequence, or a segment is missing from a chromosome. Nucleotides are the basic …

  6. DELETION | definition in the Cambridge English Dictionary

    A deletion is also the loss of part of a chromosome (= structure containing the information that controls what plants and animals are like), or the chromosome that results from such a loss.

  7. deletion noun - Definition, pictures, pronunciation and usage notes ...

    Definition of deletion noun from the Oxford Advanced Learner's Dictionary. deletion (to something) the act of removing something that has been written or printed, or that has been stored on a computer; …

  8. Deletion - definition of deletion by The Free Dictionary

    Define deletion. deletion synonyms, deletion pronunciation, deletion translation, English dictionary definition of deletion. n. 1. The act of deleting; removal by striking out. 2. Material, such as a word or …

  9. deletion, n. meanings, etymology and more | Oxford English Dictionary

    deletion, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

  10. Definition of deletion - NCI Dictionary of Genetics Terms

    A type of genetic change that involves the absence of a segment of DNA. It may be as small as a single base but can vary significantly in size.