#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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