Linked from
The 19 pages that link to Diploid, each with the reason it gives.
GameteCompared with: Gametes usually have half the chromosome sets found in diploid body cells.
PolyploidyCompared with: Diploidy is the usual reference condition that polyploidy exceeds.
GametophyteCompared with: The diploid sporophyte alternates with the haploid gametophyte.
HaploidCompared with: Diploid is the two-set condition commonly contrasted with haploid.