#letter_of_the_alphabet__letter__alphabetic_character  the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"
  supertype:  grapheme__character__graphic_symbol__graphicsymbol  a written symbol that is used to represent speech; "the Greek alphabet has 24 characters"
  subtype:  ascender.letter_of_the_alphabet  descender.letter_of_the_alphabet  digraph  initial  A  B  c  D  E  F  G  H  i  J  K  L  M  n  O  P  Q  R  S  T  U  V  W  X  Y  z  alpha  beta  gamma  delta.letter_of_the_alphabet  epsilon  zeta  eta  theta  iota  kappa  lambda.letter_of_the_alphabet  mu  nu  xi  omicron  pi  rho  sigma  tau  upsilon  phi  chi  psi  omega  aleph  beth  gimel  daleth  he  waw  zayin  heth  teth  yodh  kaph  lamedh  mem  nun.letter_of_the_alphabet  samekh  ayin  pe  sadhe  qoph  resh  sin  shin.letter_of_the_alphabet  taw  polyphone  block_letter  vowel  consonant.letter_of_the_alphabet
  member of:  alphabet
  part of:  spelling  forming words with letters according to the principles underlying accepted usage

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