decidua |
a mucous membrane that lines the uterus and is cast off at childbirth or during menstruation. |

deciduous |
of trees and shrubs, having leaves that drop off seasonally each year. (Cf. evergreen.) [3 definitions] |

decigram |
a unit of weight equal to one tenth of a gram or 1.543 grains. |

decile |
in statistics, any of the values that divide a frequency distribution into ten groups of equal frequency, or any one of these groups. |

deciliter |
a unit of capacity equal to one tenth of a liter or 3.39 fluid ounces. |

decillion |
the number represented by the Arabic numeral 10^{33}. [2 definitions] |

decimal |
pertaining to the number ten or to tenths. [5 definitions] |

decimal classification |
a system of organizing books in libraries using numbers with decimals. |

decimal fraction |
a fraction whose denominator is some power of ten, indicated by a decimal point before the numerator, such as .7, equaling seven tenths, or .015, equaling fifteen thousandths. (Cf. common fraction.) |

decimal point |
a period placed before the numerator in a decimal fraction. |

decimal system |
a numbering or measuring system based on the number ten. [2 definitions] |

decimate |
to destroy a large part or number of. [2 definitions] |

decimation |
the act of destroying a large part or number of something. |

decimeter |
a unit of length equal to one tenth of a meter or 3.937 inches. |

decipher |
to convert from a coded form to ordinary language; decode. [2 definitions] |

decipherable |
combined form of decipher. |

decision |
the act of deciding, or the judgement, choice, or resolution that one has come to after considering a matter. [2 definitions] |

decisive |
having the power or character to make decisions or end disputes. [2 definitions] |

decistere |
a unit of volume equal to one tenth of a stere or cubic meter or 3.532 cubic feet. |

deck |
a horizontal platform or floor that extends from side to side of a ship and that may have other platforms above or below it. [6 definitions] |

deck chair |
a lightweight folding chair, often with a full-length leg rest, often used on passenger ships. |