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.
The noun SEXTANT has 2 senses: 1. a unit of angular distance equal to 60 degrees. 2. a measuring instrument for measuring the angular distance between celestial objects; resembles an octant. Familiarity information: SEXTANT used as a noun is rare.