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  2. Precursor (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Precursor_(chemistry)

    In chemistry, a precursor is a compound that participates in a chemical reaction that produces another compound. In biochemistry , the term "precursor" often refers more specifically to a chemical compound preceding another in a metabolic pathway , such as a protein precursor .

  3. Precursor chemicals - Wikipedia

    en.wikipedia.org/wiki/Precursor_chemicals

    Drug precursors, also referred to as precursor chemicals or simply precursors, are substances used to manufacture illicit drugs. Most precursors also have legitimate commercial uses and are legally used in a wide variety of industrial processes and consumer products, such as medicines, flavourings, and fragrances.

  4. Precursor - Wikipedia

    en.wikipedia.org/wiki/Precursor

    Precursor (physics), a phenomenon of wave propagation in dispersive media; Precursor in the course of a disease, a state preceding a particular stage in that course; Precursor cell (biology), a unipotent stem cell; Earthquake precursor, a diagnostic phenomenon that can occur before an earthquake; Gehrlein Precursor, a glider

  5. Precursorism - Wikipedia

    en.wikipedia.org/wiki/Precursorism

    The concept has been applied to those who would find precursors of Darwin in the early nineteenth century, [3] and to those who would find anticipations of modern science in ancient cultures from the Near East to Mesoamerica. [4] Precursorism has recently been identified as a significant factor in some studies of the work of Islamic scientists. [5]

  6. Urdu Dictionary Board - Wikipedia

    en.wikipedia.org/wiki/Urdu_Dictionary_Board

    The Urdu Dictionary Board (Urdu: اردو لغت بورڈ, romanized: Urdu Lughat Board) is an academic and literary institution of Pakistan, administered by National History and Literary Heritage Division of the Ministry of Information & Broadcasting. Its objective is to edit and publish a comprehensive dictionary of the Urdu language.

  7. Formaldehyde - Wikipedia

    en.wikipedia.org/wiki/Formaldehyde

    Formaldehyde is a common precursor to more complex compounds and materials. In approximate order of decreasing consumption, products generated from formaldehyde include urea formaldehyde resin , melamine resin , phenol formaldehyde resin , polyoxymethylene plastics , 1,4-butanediol , and methylene diphenyl diisocyanate . [ 40 ]

  8. Sperm - Wikipedia

    en.wikipedia.org/wiki/Sperm

    This process involves the production of several successive sperm cell precursors, starting with spermatogonia, which differentiate into spermatocytes. The spermatocytes then undergo meiosis, reducing their chromosome number by half, which produces spermatids. The spermatids then mature and, in animals, construct a tail, or flagellum, which ...

  9. List of English words of Hindi or Urdu origin - Wikipedia

    en.wikipedia.org/wiki/List_of_English_words_of...

    from Hindi and Urdu: An acknowledged leader in a field, from the Mughal rulers of India like Akbar and Shah Jahan, the builder of the Taj Mahal. Maharaja from Hindi and Sanskrit: A great king. Mantra from Hindi and Sanskrit: a word or phrase used in meditation. Masala from Urdu, to refer to flavoured spices of Indian origin.