1. Having a lower than normal ceiling

See also: ceilinged

• family Dilleniaceae
• family Dinornithidae
• family Diodontidae
• family Diomedeidae
• family Dioscoreaceae
• family Dipodidae
• family Dipsacaceae
• family Dipterocarpaceae
• family Discoglossidae
• family doctor
• family Doliolidae
• family Dracunculidae
• family Drepanididae
• family Dromaeosauridae
• family Droseraceae
• family Drosophilidae
• family Dryopteridaceae
• family Dugongidae
• family Dytiscidae
• family Ebenaceae
• family Echeneidae
• family Echeneididae
• family Edaphosauridae
• family Eimeriidae
• family Elaeagnaceae