This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Relating to, or observed with, a barometer, barometric.

Pertaining to or of the nature of a barometer; barometric.

adj. relating to atmospheric pressure or indicated by a barometer

"However, during the first week of April, after a sudden barometrical fall, a renewed rise was marked by a heavy gale of wind, lasting five or six days; then the needle of the instrument remained stationary at a height of twenty-nine inches and nine-tenths, and the weather appeared propitious for an excursion."

barometrical aërometer   

seismic-type    thermometrical    trigonometrical    lessonswatch    approximative