English Words Starting With I

• isoelectric point

  nounLow/Very Specialised
  /ˌaɪ.səʊ.ɪˌlek.trɪk ˈpɔɪnt/The specific pH at which a molecule, especially a protein or amino acid, carries no net electrical charge.
• isoenzyme

  nounVery low
  /ˌaɪ.səʊˈen.zaɪm/A form of an enzyme that has a slightly different amino acid sequence from other forms of the same enzyme but still catalyses the same chemical reaction.
• isoflavone

  nounLow
  /ˌaɪsəʊˈfleɪvəʊn/A type of organic compound belonging to the flavonoid family, found primarily in legumes like soybeans, known for its estrogen-like effects.
• isoflurane

  nounVery Low
  /ˌaɪsəʊˈflʊəreɪn/A halogenated ether used as an inhalation anaesthetic.
• isogamete

  nounRare/Very Specialized
  /ˌaɪsə(ʊ)ˈɡæmiːt/A gamete (reproductive cell) that is morphologically identical in size and form to the gamete it fuses with during sexual reproduction, with no distinction into 'male' or 'female' types based on appearance.
• isogamy

  nounVery low / Technical
  /aɪˈsɒɡ.ə.mi/A form of sexual reproduction in which the gametes (sex cells) are similar in size and morphology; they are not distinguished as male or female based on their physical appearance.
• isogeotherm

  nounRare / Technical
  /ˌaɪ.sə(ʊ)ˈdʒiː.ə(ʊ)ˌθɜːm/An imaginary line or surface connecting points within the Earth having the same average temperature.
• isogloss

  nounLow
  /ˈaɪ.səʊ.ɡlɒs/A line on a map marking the boundary of a particular linguistic feature.
• isogon

  nounC2
  /ˈaɪsə(ʊ)ɡɒn/A polygon with equal angles.
• isogonal

  adjectivenounVery Low
  /aɪˈsɒɡ.ə.nəl/Relating to or having equal angles.
• isogonal line

  nounRare
  /aɪˈsɒɡ.ən.əl laɪn/A line on a map or chart connecting points of equal magnetic declination (the angle between magnetic north and true north).
• isogonic

  adjectivenounLow
  /ˌaɪsə(ʊ)ˈɡɒnɪk/An adjective describing lines on a map connecting points of equal magnetic declination (the angle between magnetic north and true north).
• isogradient

  nounVery Low
  /ˌaɪ.səʊˈɡreɪ.di.ənt/A line on a map or chart connecting points of equal gradient or slope.
• isograft

  nounVery low frequency
  /ˈaɪsə(ʊ)ɡrɑːft/A tissue or organ graft transplanted between genetically identical individuals (e.g., identical twins).
• isogram

  nounC2
  /ˈaɪsə(ʊ)ɡræm/A word, phrase, or sentence in which no letter of the alphabet occurs more than once.
• isograph

  nounVery Low (C2+)
  /ˈaɪ.sə.ɡrɑːf/A line on a map or chart connecting points where a given variable has equal values; a type of curve in mathematics defined by a constant.
• isogriv

  nounVery rare
  /ˈaɪsə(ʊ)ɡrɪv/A line on a map or chart connecting points of equal magnetic variation and grivation.
• isohaline

  nounC2
  /ˌaɪ.səʊˈheɪ.laɪn/A line on a map connecting points of equal salinity in water bodies, especially oceans.
• isohel

  nounVery Rare / Technical
  /ˈaɪ.səʊ.hɛl/A line on a map connecting points having equal duration of sunshine.
• isohume

  nounExtremely Rare / Technical
  /ˈʌɪsəʊˌhjuːm/A line on a map connecting points of equal humidity.

Showing 3341–3360 of 3621 words.