dd -abbr

  1. dated
  2. delivered

DD -abbr

  1. days after date
  2. demand draft
  3. dishonorable discharge
  4. doctor of divinity
  5. due date

Dday -n

  1. a day set for launching an operation
  2. June 6, 1944, on which Allied forces began the invasion of France in World War II

ddC [,dē-(,)dē-'sē] -n

  1. a synthetic nucleoside C 9H 13N 3O 3that inhibits replication of retroviruses and is used in the treatment of advanced HIV infection called also zalcitabine

DDC -abbr

  1. Dewey Decimal Classification

DDD [,dē-(,)dē-'dē] -n

  1. an insecticide C 14H 10Cl 4closely related chemically and similar in properties to DDT

DDE [,dē-(,)dē-'ē] -n

  1. a persistent organochlorine C 15H 8Cl 4that is produced by the metabolic breakdown of DDT

ddI [,dē-(,)dē-'ī] -n

  1. a synthetic nucleoside C 10H 12N 4O 3having properties and uses similar to those of ddC called also didanosine

DDS -abbr

  1. doctor of dental surgery

DDT [,dē-(,)dē-'tē] -n

  1. a colorless odorless water-insoluble insecticide C 14H 9Cl 5that is an aromatic organochlorine banned in the U.S. that tends to accumulate and persist in ecosystems and has toxic effects on many vertebrates

DDVP [,dē-(,)dē-,vē-'pē] -n

  1. dichlorvos