| COUNTEREXAMPLE | • counterexample n. (Logic) An example that counters a general rule; an exception to a general rule; a specific instance… • COUNTEREXAMPLE n. an example that refutes or disproves a proposition or theory. | 
| DEMULTIPLEXERS | • demultiplexers n. Plural of demultiplexer. • DEMULTIPLEXER n. an electronic device that separates a multiplex signal into its component parts. | 
| EXCREMENTITIAL | • excrementitial adj. (Physiology) Pertaining to, or consisting of, excrement; of the nature of excrement. • EXCREMENTITIAL adj. of or pertaining to excrement, also EXCREMENTAL. | 
| EXPERIENTIALLY | • experientially adv. In terms of experience. • EXPERIENTIAL adv. relating to, derived from, or providing experience. | 
| EXPERIMENTALLY | • experimentally adv. In the manner of an experiment. • EXPERIMENTAL adv. of, relating to, or based on experience or experiment. | 
| EXTRAVERSIVELY | • EXTRAVERSIVE adv. turning outwards. | 
| EXTROVERSIVELY | • extroversively adv. In an extroversive manner. • EXTROVERSIVE adv. characterised by extroversion. | 
| HETERODUPLEXES | • heteroduplexes n. Plural of heteroduplex. • HETERODUPLEX n. a nucleic-acid molecule, such as DNA, composed of two chains with each derived from a different parent molecule. | 
| HETEROFLEXIBLE | • heteroflexible adj. Primarily heterosexual, but open to taking part in a limited amount of homosexual activity. • heteroflexible n. Someone who is heteroflexible. • HETEROFLEXIBLE n. one of flexible sexual orientation. | 
| HETEROSEXUALLY | • heterosexually adj. In a heterosexual way. • HETEROSEXUAL adv. attracted to the opposite sex. | 
| HYPERCATALEXES | • HYPERCATALEXIS n. the state of being hypercatalectic. | 
| HYPEREXCITABLE | • hyperexcitable adj. Unusually or excessively excitable. • HYPEREXCITABLE adj. excessively excitable. | 
| SUPEREXCELLENT | • superexcellent adj. Uncommonly excellent; of supreme excellence. • superexcellent adj. Better than excellent. • SUPEREXCELLENT adj. excellent to a very high degree. | 
| ULTRAEXPENSIVE | • ultraexpensive adj. Extremely expensive. | 
| UNDEREXPLOITED | • underexploited adj. Not exploited to any great extent; not used to full advantage. • UNDEREXPLOIT v. to make insufficient use of. |