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phagocytosis
Science; General science
A mechanism by which single cells of the animal kingdom, such as smaller protozoa, engulf and carry particles into the cytoplasm. It differs from endocytosis primarily in the size ...
screw jack
Science; General science
A mechanism for lifting and supporting loads, usually of large size. A screw jack mechanism consists of a thrust collar and a nut which rides on a bolt; the threads between the ...
transduction (bacteria)
Science; General science
A mechanism for the transfer of genetic material between cells. The material is transferred by virus particles called bacteriophages (in the case of bacteria), or phages. The ...
escapement
Science; General science
A mechanism in which a toothed wheel engages alternate pallets attached to an oscillating member. The escapement is found principally in timepieces but may be employed wherever ...
taxis
Science; General science
A mechanism of orientation by means of which an animal moves in a direction related to a source of stimulation. There exists a widely accepted terminology in which the nature of ...
straight-line mechanism
Science; General science
A mechanism that produces a straight-line (or nearly so) output motion from an input element that rotates, oscillates, or moves in a straight line. Common machine elements, such ...
sewing machine
Science; General science
A mechanism that stitches cloth, leather, book pages, and other material by means of a double-pointed needle or an eye-pointed needle. In ordinary two-threaded machines, a lock ...
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