DTaP is a vaccine that helps children younger than age 7 develop immunity to three deadly diseases caused by bacteria: diphtheria, tetanus, and whooping cough (pertussis). Tdap is a booster immunization given at age 11 that offers continued protection from those diseases for adolescents and adults. Diphtheria is a respiratory disease that can cause breathing problems, paralysis, heart failure, and death. It's highly contagious and is spread by coughing and sneezing.
adroit(adj) quick or skillful or adept in action or thought. an exceptionally adroit pianist; an adroit technician; his adroit replies to hecklers won him many followers; an adroit negotiator.
Definition of sextant in the English dictionary The definition of sextant in the dictionary is an optical instrument used in navigation and consisting of a telescope through which a sighting of a heavenly body is taken, with protractors for determining its angular distance above the horizon or from another heavenly body.