- The high gear ratio means the lower is the reduction between the engine and the road wheels. Conversely the lower the gear ratio means the greater is the reduction between the engine and road wheels. The top gearbox ratio is 1:1 when the gearbox input shaft connects directly with the gearbox output shaft; in this case, it calls direct drive. Example: - Most gearboxes have an over drive shift.
couplet - a stanza consisting of two successive lines of verse; usually rhymed. line of poetry, line of verse - a single line of words in a poem. closed couplet - a rhymed couplet that forms a complete syntactic unit. heroic couplet - a couplet consisting of two rhymed lines of iambic pentameter and written in an elevated style. stanza - a fixed number of lines of verse forming a unit of a poem.
LINK / CITE ADD TO WORD LIST. noun. The definition of a graft is a piece of a plant or tree attached onto another plant or tree, or a piece of skin or bone which is attached to another place on a body, both of which result in becoming a permanent part to whatever they are attached onto.countable and uncountable, plural grafts). ( 1 countable) A small shoot or scion of a tree inserted in another tree, the stock of which is to support and nourish it. 2  The two unite and become one tree, but the graft determines the kind of fruit. ( 3 countable) A branch or portion of a tree growing from such a shoot.