These are the meanings of the letters PERFRICATION when you unscramble them.
- Proficient (a.)
Well advanced in any branch of knowledge or skill; possessed of considerable acquirements; well-skilled; versed; adept,
- Proficient (n.)
One who has made considerable advances in any business, art, science, or branch of learning; an expert; an adept; as, proficient in a trade; a proficient in mathematics, music, etc.
- Refraction (n.)
The act of refracting, or the state of being refracted.
- Refraction (n.)
The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction.
- Refraction (n.)
The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different density from that through which it has previously moved.
- Refraction (n.)
The correction which is to be deducted from the apparent altitude of a heavenly body on account of atmospheric refraction, in order to obtain the true altitude.