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
primary social group; parents and children; "he wanted to have a good job before starting a family"
people descended from a common ancestor; "his family has lived in Massachusetts since the Mayflower"
a social unit living together; "he moved his family to Virginia"; "It was a good Christian household"; "I waited until the whole house was asleep"; "the teacher asked how many people made up his home"
(biology) a taxonomic group containing one or more genera; "sharks belong to the fish family"
an association of people who share common beliefs or activities; "the message was addressed not just to employees but to every member of the company family"; "the church welcomed new members into its fellowship"
the number of observations in a given statistical category
the ratio of the number of observations in a statistical category to the total number of observations
the number of occurrences within a given time period; "the frequency of modulation was 40 cycles per second"; "the frequency of his seizures increased as he grew older"