(neuroanatomy) The space between the arachnoid mater and the pia mater that surrounds the brain and spinal cord, through which the cerebrospinal fluid circulates and major blood vessels pass, and across which extend delicate trabeculae of connective tissue.

A domestic cat of an extinct medium-sized, short-haired breed, originating in the United States during the 1980s, which was bred to resemble a leopard.

The length of time, or span that one can pay attention, or concentrate on one topic without becoming distracted.

present participle of spark

The act of producing a spark.

The number of items, usually words or numbers, that a person can retain and recall. Memory span is a test of working memory (short-term memory).

plural of space request

If one does not discipline a child, he or she will never learn obedience and good manners.

(transitive, intransitive) To format (a document) so that every other line is left blank, leaving sufficient whitespace for annotation (e.g. a teacher's corrections).

(anatomy) The space in the wrist bounded by the hamate, capitate, triquetral and lunate bones.