[1] : The Collaborative International Dictionary of English v.0.48

chromosome \chro"mosome`\, n. gr. ? color + ? the body.
   biol.
   one of the minute bodies into which the chromatin of the
   nucleus is resolved during mitotic cell division; the idant
   of weismann.
   1913 webster
see also:
idant 

[2] : WordNet (r) 2.0

chromosome
     n : a threadlike body in the cell nucleus that carries the genes
         in a linear order

[3] : Moby Thesaurus II by Grady Ward, 1.0

61 moby thesaurus words for "chromosome":
   altmann theory, dna, de vries theory, galtonian theory,
   mendelianism, mendelism, rna, verworn theory, w chromosome,
   weismann theory, weismannism, wiesner theory, x chromosome,
   y chromosome, z chromosome, accessory chromosome, allele,
   allelomorph, allosome, autosome, birth, centromere, character,
   chromatid, chromatin, chromosome complement, chromosome number,
   determinant, determiner, diathesis, diploid number, endowment,
   euchromosome, eugenics, factor, gene, gene-string, genesiology,
   genetic code, genetics, genome, haploid number, hereditability,
   heredity, heritability, heritage, heterochromosome,
   homologous chromosomes, idiochromosome, inborn capacity,
   inheritability, inheritance, matrocliny, monosome, patrocliny,
   pharmacogenetics, polyploidy, recessive character, replication,
   sex chromosome, univalent chromosome

Chromosome >> C Words
Chromosome, definition of term: Chromosome
chromosome_pag1.html

Y Chromosome >> Y Words
Y Chromosome, definition of term: Y Chromosome
y+chromosome_pag1.html

Sex Chromosome >> S Words
Sex Chromosome, definition of term: Sex Chromosome
sex+chromosome_pag1.html

X Chromosome >> X Words
X Chromosome, definition of term: X Chromosome
x+chromosome_pag1.html