Spectacled tern Spectacled tern The spectacled tern ("Onychoprion lunatus"), also known as the grey-backed tern, is a seabird in the family Laridae. A close relative of the bridled and sooty terns (with which it is sometimes confused), the spectacled tern is less common than the other members of its genus and it has been studied less. The three species, along with the Aleutian tern were recently split into a new genus "Onychoprion" from "Sterna" (Bridge "et al.", 2005). They resemble the sooty tern but with a grey back instead of a black one. Their breast and underparts are white, and they have
Numerology summing digits in these bases yields different results. The first example, shown above, appears thus when rendered in octal (base 8): The Arabic system of numerology is known as Abjad notation or Abjad numerals. In this system each letter of Arabic alphabet has a numerical value. This system is the foundation of "ilm-ul-cipher", the Science of Cipher, and "ilm-ul-huroof", the Science of Alphabet: ط=9 ح=8 ز=7 و=6 ه=5 د=4 ج=3 ب=2 أ=1 ص=90 ف=80 ع=70 س=60 ن=50 م=40 ل=30 ك=20 ي=10 ظ=900 ض=800 ذ=700 خ=600 ث=500 ت=400 ش=300 ر=200 ق=100 غ=1000 Some Chinese assign a different set of meanings to