Science / Chemistry / Lattice: A regular array of ions or atoms.

Diaper Work

Entertainment / Literature / Diaper Work: In spite of how unpleasant the word sounds, diaper work is actually a common, beautiful design in medieval manuscripts. Here is Kathleen Scott's succinct summary of diaper work: A type of decorative b MORE


Science / Biology / Taxonomy: A systematic method of classifying plants and animals. Classification of organisms based on degrees of similarity purportedly representing evolutionary (phylogenetic) relatedness. MORE

Piezo (Tweeter)

Technology / Home Audio / Piezo (Tweeter): A tweeter whose motor is simply a crystal of Piezo material through which the signal current flows. The crystal lattice responds to this by bending in proportion to the Amplitude and frequency of the MORE

Piezoelectric Driver

Technology / Home Audio / Piezoelectric Driver: This is among the most robust and least expensive alternative drivers for the high frequency reproduction. The material used in the Piezoelectric Driver is a piezoelectric polymer first developed in t MORE


Science / Geology / Obsidian: A glassy igneous rock with a composition similar to granite. The glassy texture is a result of cooling so fast that mineral lattices were not developed. Picture of Obsidian. MORE


Science / Geology / Mineral: A naturally occurring element or compound with a precise chemical formula and a regular internal lattice structure. Organic products are usually not included. MORE