12-Letter Words Containing: A,B,I,S,T,T,U

• Pertaining to a region in the Southern Hemisphere immediately north of Antarctica and covering the many islands of the southern parts of the Indian Ocean, Atlantic Ocean and Pacific Ocean, which are north of the Antarctic Convergence.

• someone who walks about in their sleep

• defining rights and duties as opposed to giving the rules by which rights and duties are established

• any word or group of words functioning as a noun

• of or relating to the real nature or essential elements of something

• being on topic and prompting thought

• of adjectives; placed before the nouns they modify

• sulfonylurea; an oral antidiabetic drug (trade name Orinase) used in the treatment of adult-onset diabetes mellitus

• being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs)

• a general accommodation to unchanging environmental conditions

• of or relating to or having the nature or function of a substantive (i.e. a noun or noun equivalent)

• According to the World Meteorological Organization, a mid-level, principal cloud type, generally formless and dark grey in colour, which forms from altostratus occurring in layers at the middle altitude of the troposphere (usually above 2400 metres). Nimbostratus usually brings precipitation as the mid-level clouds thicken and subside into the low level of the troposphere. Frontal or cyclonic lift can also carry the top of a deep nimbostratus layer into the high levels of the troposphere. Also classified or characterized as multi-level; abbreviated Ns.