The Collaborative International Dictionary of English v.0.48:

Logogram \Log"o*gram\, n. [Gr. lo`gos word + -gram.]
   A word letter; a phonogram, that, for the sake of brevity,
   represents a word; as, |, i. e., t, for it. Cf.
   Grammalogue.
   [1913 Webster]

WordNet (r) 3.0 (2006):

logogram
    n 1: a single written symbol that represents an entire word or
         phrase without indicating its pronunciation; "7 is a
         logogram that is pronounced `seven' in English and
         `nanatsu' in Japanese" [syn: logogram, logograph]

Moby Thesaurus II by Grady Ward, 1.0:

109 Moby Thesaurus words for "logogram":
   abuse of terms, acrostic, allegory, alphabet, amphibologism,
   amphiboly, anagram, arrowhead, art, blueprint, calembour,
   character, charactering, characterization, charactery, chart,
   choreography, cipher, conventional representation,
   conventional symbol, corruption, cuneiform, dance notation,
   delineation, demonstration, demotic character, depiction,
   depictment, determinative, diagram, drama, drawing, emblem,
   equivocality, equivoque, exemplification, figuration, grammalogue,
   hieratic symbol, hieroglyph, hieroglyphic, hieroglyphics, hiragana,
   iconography, iconology, ideogram, ideograph, illustration, imagery,
   imaging, jeu de mots, kana, katakana, letter, limning, logograph,
   logogriph, logotype, love knot, malapropism, map, metagram,
   missaying, musical notation, notation, ogham, palindrome,
   paronomasia, phonetic, phonetic symbol, pictogram, pictograph,
   picturization, plan, play on words, portraiture, portrayal,
   prefigurement, presentment, printing, projection, pun, punning,
   radical, realization, rendering, rendition, representation, rune,
   schema, score, script, shorthand, spoonerism, syllabary, symbol,
   symbolic system, symbolism, symbolization, symbology, tablature,
   token, totem, totem pole, type, wedge, word letter, wordplay,
   writing