produced by a wildly fanciful imagination; "his Utopia is not a chimerical commonwealth but a practical improvement on what already exists"- Douglas Bush
a variable quantity that can be resolved into components
any agent (person or animal or microorganism) that carries and transmits a disease; "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects"
a straight line segment whose length is magnitude and whose orientation in space is direction
not consisting of matter; "immaterial apparitions"; "ghosts and other immaterial entities"
(often followed by `to') lacking importance; not mattering one way or the other; "whether you choose to do it or not is a matter that is quite immaterial (or indifferent)"; "what others think is altogether indifferent to him"
of no importance or relevance especially to a law case; "an objection that is immaterial after the fact"