(computer science) The study and classification of decision problems by the computational resources—such as time and space—needed by the programs that solve the problems.

(grammar) a sentence that contains an independent clause as well as one or more dependent clauses, such as a relative clause, an adverbial clause, or a noun clause.

(mathematics) a representation of the space of complex numbers

(computer science) the amount of time an algorithm requires to run, as a function of the amount of input, measured in such a way as to ignore constant terms and multiplication by constant terms

(chemistry) A transitional structure, in an energetically excited state, that forms between the reactants of a chemical reaction and breaks down to form the products

(psychology) An individual difference (can be thought of as a personality variable) referring to the extent that an individual prefers complex explanations for behavior.

(chemistry) Any of several forms in which three different molecules are tightly bound together

(topology) A simplicial complex where every collection of pairwise adjacent vertices spans a simplex.

(topology) A collection of simplices of various dimensions, connected to one another according to certain rules.

(mathematics) A 2-dimensional CW complex encoding information about a group and its presentation.