Term: radial velocity: velocity along the line of sight toward or away from the observer
Broader: speed: distance travelled per unit time | Unrelated: cross section: a section created by a plane cutting a solid perpendicular to its longest axis
Broader: speed: distance travelled per unit time | Unrelated: constellation: a configuration of stars as seen from the earth
Broader: speed: distance travelled per unit time | Unrelated: postmaster general: the official in charge of the national postal service
Broader: speed: distance travelled per unit time | Unrelated: snowsuit: a child's overgarment for cold weather
Broader: speed: distance travelled per unit time | Unrelated: toadstool: common name for an inedible or poisonous agaric (contrasting with the edible mushroom)
Broader: speed: distance travelled per unit time | Unrelated: light air: wind moving 1-3 knots; 1 on the Beaufort scale
Broader: speed: distance travelled per unit time | Unrelated: carolina moonseed: woody vine of southeastern United States resembling the common moonseed but having red fruits
Broader: speed: distance travelled per unit time | Unrelated: alma mater: your alma mater is a school you graduated from
Broader: speed: distance travelled per unit time | Unrelated: caseworm: insect larva that constructs a protective case around its body
Broader: speed: distance travelled per unit time | Unrelated: dianthus: carnations and pinks