hor·i·zon·tal 
(hôr′ĭ-zŏntl, hŏr′-)
(hôr′ĭ-zŏntl, hŏr′-)adj.
1. Of, relating to, or near the horizon.
2.
a. Parallel to or in the plane of the horizon.
b. At right angles to a vertical line.
3. Occupying or restricted to the same level in a hierarchy: a horizontal study of verbal ability; a horizontal transfer by an employee.
4. Medicine Of or relating to transmission of infection by contact with or physical proximity to an infected individual or fomite.
n.
Something, such as a line, plane, or object, that is horizontal.
[French, from Latin horizōn, horizont-, horizon; see HORIZON.]
hor′i·zon·tali·ty (-zən-tălĭ-tē), hor′i·zontal·ness n.
hor′i·zontal·ly adv.
- propitiousness
- propjet
- proplastid
- propofol
- propolis
- proponent
- proportion
- proportionable
- proportionably
- proportional
- proportionality
- proportionally
- proportional representation
- proportionate
- proportionately
- proportionateness
- proportioner
- proportionment
- proposal
- propose
- proposer
- proposition
- propositional
- propositional calculus
- propositional function