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a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid

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of or relating to latitudes just south of the Arctic Circle

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(of water) rising naturally in a well to a height appreciably above that of the surrounding water table but not flowing out of the well

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of dimensions smaller than atomic dimensions

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of or relating to constituents of the atom or forces within the atom

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a particle that is less complex than an atom

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the lowest molding of an architectural base or of a baseboard

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working as a substitute for someone who is ill or on leave of absence

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(biology) a taxonomic category below a class and above an order

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a subclass of Sporozoa

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heliozoans

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one of four subclasses or superorders of Monocotyledones