Weaning Your Baby Onto Solids. The term 'to wean' comes from an ancient phrase that means 'to accustom to'. So weaning refers to the period during which an infant gradually becomes accustomed to food other than milk (breast or formula). Up until 6 months of age, breast or formula milk alone is nutritionally adequate.
Occasional airplane vibration during flight is not unusual. There are many causes of airplane vibration, including landing gear extension and retraction, extension of speed brakes, free play in movable surfaces, and systems malfunctions.
Turbulence is what nervous fliers fear the most when they board an aircraft. It is also the most common cause of injury to air passengers - in the US alone there are an estimated 58 injuries each year due to turbulence. Pilots will always keep their seatbelts fastened while seated on an aircraft and will usually advise you to do the same.