The daytime team got an urgent handover from the afterhours department.

Derivatives can refer to anything that is derived from something else, but here they refer specifically to functions that give the slope of the tangent line to a curve.

Coordinate term: debut

St. Martin [of Tours] looks round, first, deliberately;—becomes aware of a tatterdemalion and thirsty-looking soul of a beggar at his chair side, who has managed to get his cup filled somehow, also—by a charitable lacquey. St. Martin turns his back on the Empress, and hobnobs with him!