drop a line
— Verb
– English
～ communicate (with) in writing; "Write her soon, please!"
date line
— Noun
– English
～ an imaginary line on the surface of the earth following (approximately) the 180th meridian
dividing line
— Noun
– English
～ a conceptual separation or distinction; "there is a narrow line between sanity and insanity"
district line
— Noun
– English
～ the boundary between two districts
demarcation line
— Noun
– English
～ the boundary of a specific area
delay line
— Noun
– English
～ a circuit designed to introduce a calculated delay into the transmission of a signal
dotted line
— Noun
– English
～ a line made up of dots or dashes; often used to indicate where you are supposed to sign a contract; "just sign on the dotted line"
drop line
— Noun
– English
～ a headline with the top line flush left and succeeding lines indented to the right
drive line
— Noun
– English
～ mechanism that transmits power from the engine to the driving wheels of a motor vehicle
danger line
— Noun
– English
～ a line beyond which it is dangerous to go
dirty linen
— Noun
– English
～ personal matters that could be embarrassing if made public
diachronic linguistics
— Noun
– English
～ the study of linguistic change; "the synchrony and diachrony of language"
descriptive linguistics
— Noun
– English
～ a description (at a given point in time) of a language with respect to its phonology and morphology and syntax and semantics without value judgments
data link
— Noun
– English
～ an interconnecting circuit between two or more locations for the purpose of transmitting and receiving data
dishwashing liquid
— Noun
– English
～ a low-sudsing detergent designed for use in dishwashers
distribution list
— Noun
– English
～ list of names to whom a communication should be sent
David Livingstone
— Noun
– English
～ Scottish missionary and explorer who discovered the Zambezi River and Victoria Falls (1813-1873)
dragon lizard
— Noun
– English
～ the largest lizard in the world (10 feet); found on Indonesian islands
domestic llama
— Noun
– English
～ used in the Andes as a beast of burden and source of wool; considered a domesticated variety of the guanaco
dead load
— Noun
– English
～ a constant load on a structure (e.g. a bridge) due to the weight of the supported structure itself