Unlike an electrical synapse, the chemical synapses are separated by a space called the synaptic cleft, typically measured between 15 and 25 nm. Transmission of an excitatory signal involves several steps outlined below.
Definition of cap. 1  1a : a head covering especially with a visor and no brimb : a distinctive head covering emblematic of a position or office: such as (1) : a cardinal's biretta (2) : mortarboard.
Wiktionary (0.00 / 0 votes) Rate this definition: bonnet (Noun). A type of hat, once worn by women or children, held in place by ribbons tied under the chin.bonnet (Noun). A traditional Scottish woollen brimless cap; a bunnet.bonnet (Noun). The polishing head of a power buffer, often made of wool. bonnet (Noun).iktionary (0.00 / 0 votes) Rate this definition: bonnet (Noun). A type of hat, once worn by women or children, held in place by ribbons tied under the chin. bonnet (Noun).