See Also: Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
teacher(dictionary)
teacher's pet(dictionary)
teacher(dictionary)
beta-1,3-galactosyl-O-glycosyl-glycoprotein beta-1,6-acetylglucosaminyl transferase(medicine)
head teacher(dictionary)
substitute teacher(dictionary)
form teacher(dictionary)
supply teacher(dictionary)
beta-1,3-galactosyl-0-glycosyl-glycoprotein beta-1,3-N-acetylglucosaminyltransferase(medicine)

beta ray (medicine) and teacher (iou)


beta ray (medicine)


beta ray


1. <radiobiology> Original term used for electrons (and positrons) ejected from decaying nuclei via beta emission. (Label derives from the old days when we had various kinds of radiation emission, and they were labelled alpha, beta, and gamma (the first letters of the Greek Alphabet) because no one really knew what any of them were.)

2. A stream of positive or negative electrons ejected with high energy from a disintegrating atomic nucleus; most biomedically used isotopes emit negative particles (electrons or negatrons, rather than positrons). Cathode rays are low-energy negative electrons produced in cathode ray tubes, also called Television tubes or oscilloscopes.


teacher (iou)



teacher noun. ME.
[from TEACH verb + -ER1.]
A thing which shows something or points something out; spec. the index finger. rare. Only in ME.
a. A person who or thing which teaches or instructs; an instructor; esp. a person employed to teach in a school. ME.
teacher appraisal, teacher-librarian, teacher-Training, teacher-tutor, etc. ELEMENTARY teacher. primary teacher: see PRIMARY adjective. secondary teacher: see SECONDARY adjective. supply teacher: see SUPPLY noun.
C. Phillips An English literature teacher decided to demonstrate his knowledge. fig.: Wordsworth His daily teachers had been woods and rills. attrib.:
b. In the early Congregational churches of New England, one of several officers appointed to give religious instruction. obsolete exc. Hist. M17.
Comb.: teacher edition an edition prepared especially for the use of teachers; teachers' aide an assistant employed to help the teaching staff of a school in a variety of ancillary and supervisory duties; teacher's pet the favourite pupil of a teacher (lit. & fig.).
teacheress noun (now rare or obsolete) a female teacher LME.
teacherly adjective of, pertaining to, or characteristic of a teacher L17.
teachership noun the office or function of a teacher M19.