Double Fertilization: A characteristic of angiosperms in which a pollen tube carries two sperm cells to the female gametophyte in the ovule. One sperm cell fuses with the egg cell and gives rise to a diploid embryo The other sperm cell fuses with the two polar cells to form a triploid cell that develops into the endosperm.

 

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Double Fertilization: A characteristic of angiosperms in which a pollen tube carries two sperm cells to the female gametophyte in the ovule. One sperm cell fuses with the egg cell and gives rise to a diploid embr . . . View Full Definition

Double Up: A term used in technical analysis to refer to the rise of a stock's price, a drop, and then a rise back to the same level as the original rise.

Double Top: Double top is term that technical analysts use to describe a stock price pattern that, when depicted on a chart, shows two gains to the same dollar level separated by a price drop. For examp . . . View Full Definition

Double Tide: A double-headed tide, that is, a high water consisting of two maxima of nearly the same height separated by a relatively small depression, or a low water consisting of two minima separated b . . . View Full Definition