(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.

(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.

(mathematics) a representation of the space of complex numbers

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

(topology) A collection of balls of various dimensions, with higher-dimensional ones mapped along their respective boundaries to lower-dimensional ones.

(biochemistry) A group of two or more associated proteins that remains stable over time.

plural of protein complex

(psychology) The incestuous sexual desire of a mother towards her son.

plural of Jocasta complex

(complex analysis, analytic geometry) A 1-dimensional affine subspace of a vector space over the complex numbers.