二

Computing

dual attachment concentrator

Computing

dual attachment station

Computing

duplex

Computing

square function

Computing

two stage configuration

Computing

point-to-point connection

Computing

dichotomized classification system

February and August (months when business is generally at its slowest)

dihybrid

Mathematics

binomial equation

diacidic base

second string (of a shamisen, etc.)

carbon sink; carbon dioxide sink; CO2 sink

sodium dichromate

Asarum caulescens (species of wild ginger)

biculturalism

power of two

1927 Theses; Comintern policy documents regarding capitalism, imperialism, and a possible revolution in Japan

Chemistry

lead dioxide; lead(IV) oxide

Twenty-Five Histories; authoritative collection of twenty-five Chinese historical books (the Twenty-Four Histories and the New History of Yuan)

didynamous stamen

last day of February; last day of the second lunar month

double volcano

uranium dioxide