techâ¢niâ¢cian. 1. a person who is trained or skilled in the technicalities of a field, esp. one engaged in mechanical or in applied scientific work. 2. a person skilled in the technique of an art, as music or painting.. An expert in a technique, as: a. One whose occupation requires training in a specific technical process: an electronics technician; an automotive technician.
Definition of trapezoid for English Language Learners. : a four-sided shape that has two sides that are parallel and two sides that are not parallel.
more ... A 4-sided flat shape with straight sides that has a pair of opposite sides parallel. (Called a trapezium in the UK. Both US and UK definitions of trapezium and trapezoid are swapped over.) The sides that are parallel are called bases. The other sides are legs (which may or may not be parallel).