Vocabulary Words
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B1adjective, adverb, noun, verb
(hyperbolic geometry, said of a pair of lines) Either not intersecting, or coinciding. (+24 more)
boundary
B1noun
(of a set) The set of points in the closure of a set S, not belonging to the interior of that set. (+4 more)
celsius
A2adjective
Related to a metric temperature scale, originally defined as having the freezing point of water as 0 degrees and its boiling point as 100 degrees, at standard atmospheric pressure. The standardized definition has 0.01 �C as the triple point of water, and a difference in temperature of 1 �C corresponds to 1/273.16 of the difference in temperature between the triple point and the absolute zero.
coexist
B1verb
(of two or more things, people, concepts, etc.) To exist contemporaneously or in the same area.
eighth
A2adjective, noun, verb
An eighth of an ounce, or approximately 3.5 grams, of marijuana or other drugs. (+4 more)
erosion
B1noun
(image processing) One of two fundamental operations in morphological image processing from which all other morphological operations are derived. (+8 more)
modernity
B2noun
(history) Quality of being of the modern period of contemporary historiography. (+2 more)