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Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. You can also try the grid of 16 letters. Letters must be adjacent and longer words score better. See if you can get into the grid Hall of Fame !
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Tips: browse the semantic fields (see From ideas to words) in two languages to learn more.
1.an abstract place usually conceived as having depth"a good actor communicates on several levels" "a simile has at least two layers of meaning" "the mind functions on many strata simultaneously"
2.one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
3.people having the same social, economic, or educational status"the working class" "an emerging professional class"
StratumStra"tum (?), n.; pl. E. Stratums (#), L. Strata (#). The latter is more common. [L., from sternere, stratum, to spread; akin to Gr. � to spread, strew. See Strew, and cf. Consternation, Estrade, Prostrate, Stratus, Street.]
1. (Geol.) A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively.
2. A bed or layer artificially made; a course.
Johan van Stratum • Non Access Stratum • Stratum (Netherlands) • Stratum (disambiguation) • Stratum (linguistics) • Stratum basale • Stratum corneum • Stratum germinativum • Stratum granulosum • Stratum intermedium • Stratum lucidum • Stratum lucidum (disambiguation) • Stratum lucidum of hippocampus • Stratum membranosum • Stratum spinosum • Stratum zonale of thalamus • Three stratum theory
élément du relief géographique (fr)[DomainDescrip.]
stratum (n.) [geology]
ensemble de personnes (fr)[Classe...]
creature; critter; organism; being[ClasseHyper.]
living creature; living being; organism[ClasseHyper.]
part, region - arrange, draw up, set up, sort - difference, differentiate, discriminate, distinguish, secern, secernate, separate, severalise, severalize, tell, tell apart - animate thing, living thing[Hyper.]
ensemble de personnes (fr)[Classe...]
group, grouping, party, set - social organisation, social organization, social structure, social system, structure - folk, people, persons - categorise, categorize, compartmentalise, compartmentalize, label, rubricade - assign, attribute - social group[Hyper.]
people - people - folksy - arrangement, assortment, categorisation, categorization, classification, compartmentalisation, compartmentalization, ranking - sorting - sorter - categorisation, categorization, classification, sorting - brand, description, form, formality, genre, kind, nature, sort, species, variety - categorisation, categorization, classification - class, rank, social class, socio-economic class, stratum - category, class, family - class - class, division - classifier - sorter - sort, sorting, sort-out - classificatory - relegation - classifier - social, societal[Dérivé]
class; social class; socio-economic class; stratum; rank[ClasseHyper.]
Descripteurs EUROVOC (fr)[Thème]
In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers. The "stratum" is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy.
When planning civil engineering projects or other large constructions, the strata of the area where the construction takes place is a significant factor in design decisions. For example if a canal is to be built on a route where the strata are not watertight, the canal will have to be lined with some form of waterproof material (usually clay).
Each layer is generally one of a number of parallel layers that lie one upon another, laid down by natural forces. They may extend over hundreds of thousands of square kilometers of the Earth's surface. Strata are typically seen as bands of different colored or differently structured material exposed in cliffs, road cuts, quarries, and river banks. Individual bands may vary in thickness from a few millimeters to a kilometer or more. Each band represents a specific mode of deposition: river silt, beach sand, coal swamp, sand dune, lava bed, etc.
Geologists study rock strata and categorize them by the material of beds. Each distinct layer is typically assigned to the name of sheet, usually based on a town, river, mountain, or region where the formation is exposed and available for study. For example, the Burgess Shale is a thick exposure of dark, occasionally fossiliferous, shale exposed high in the Canadian Rockies near Burgess Pass. Slight distinctions in material in a formation may be described as "members" (or sometimes "beds"). Formations are collected into "groups" while groups may be collected into "supergroups".
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|Look up stratum in Wiktionary, the free dictionary.|