Nouns in english starting with X

• X chromosome — Noun – English ～ the sex chromosome that is present in both sexes: singly in males and doubly in females; "human females normally have two X chromosomes"
• x-axis — Noun – English ～ the horizontal axis in a plane coordinate system
• X-linked gene — Noun – English ～ a gene located on an X chromosome
• X — Noun – English ～ the 24th letter of the Roman alphabet
• X-ray machine — Noun – English ～ an apparatus that provides a source of X rays
• X-ray film — Noun – English ～ photographic film used to make X-ray pictures
• X-SCID — Noun – English ～ SCID in male children resulting from mutation of a gene that codes for a protein on the surface of T cells that allows them to develop a growth factor receptor
• X-linked recessive inheritance — Noun – English ～ hereditary pattern in which a recessive gene on the X chromosome results in the manifestation of characteristics in male offspring and a carrier state in female offspring
• X-ray tube — Noun – English ～ a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
• X-ray photograph — Noun – English ～ a radiogram made by exposing photographic film to X rays; used in medical diagnosis
• X-linked dominant inheritance — Noun – English ～ hereditary pattern in which a dominant gene on the X chromosome causes a characteristic to be manifested in the offspring
• X-raying — Noun – English ～ obtaining images by the use of X rays
• X — Noun – English ～ the cardinal number that is the sum of nine and one; the base of the decimal system
• X-ray diffraction — Noun – English ～ the scattering of X rays by the atoms of a crystal; the diffraction pattern shows structure of the crystal
• X-ray — Noun – English ～ a radiogram made by exposing photographic film to X rays; used in medical diagnosis
• X ray — Noun – English ～ electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
• X-ray therapy — Noun – English ～ the therapeutic use of X rays
• X ray — Noun – English ～ a radiogram made by exposing photographic film to X rays; used in medical diagnosis
• X-ray picture — Noun – English ～ a radiogram made by exposing photographic film to X rays; used in medical diagnosis
• X-radiation — Noun – English ～ obtaining images by the use of X rays

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