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early 14c., "an attack of fever," from Old French acces "onslaught, attack; onset (of an illness)" (14c.), from Latin accessus "a coming to, an approach," noun use of past participle of accedere "approach" (see accede). The later senses are directly from Latin. Meaning "an entrance" is from c.1600. Meaning "habit or power of getting into the presence of (someone or something)" is from late 14c.
1962, originally in computing, from access (n.). Related: Accessed; accessing.
access ac·cess (āk'sěs)
A means of approaching, entering, exiting, or making use of; passage.
The space required to view a tooth and manipulate dental instruments to remove decay and prepare the tooth for restoration.
The opening in the crown of a tooth necessary to allow adequate admittance to the pulp space to clean, shape, and seal the root canal.