First Greek letter

noun

1. The 1st letter of the Greek alphabet see Alphabet Table
2. Something that is first beginning compare omega see also alpha and omega
3. Something or someone designated with the name alpha or the Greek letter α especially denoting the first in position, order, or class
4. Alpha wave
5. Alpha particle
6. The first version of a product (such as a computer program) that is being developed and tested
7. A socially dominant person or animal

   "Mike is the ringleader, the alpha of the group. Tom is his wingman …"

adjective

1. Closest in the structure of an organic molecule to a particular group or atom
2. Socially dominant especially in a group of animals

   "an alpha male"

3. Alphabetic

noun

1. A positively charged nuclear particle identical with the nucleus of a helium atom that consists of two protons and two neutrons and is ejected at high speed in certain radioactive transformations

noun

1. An electrical rhythm of the brain with a frequency of approximately 8 to 13 cycles per second that is often associated with a state of wakeful relaxation

adjective

1. Of, relating to, or being an alpha-receptor

   "alpha-adrenergic blocking action"

noun

1. The beginning and ending
2. The principal element

noun

1. A fetal blood protein present abnormally in adults with some cancers (as of the liver) and normally in the amniotic fluid of pregnant women with high or low levels tending to be associated with certain birth defects (such as spina bifida or Down syndrome)

noun

1. Any of several globulins of plasma or serum that have at alkaline pH the greatest electrophoretic mobility next to albumin compare beta globulin, gamma globulin

noun

1. The coiled structural arrangement of many proteins consisting of a single chain of amino acids stabilized by hydrogen bonds

noun

1. Any of various carboxylic acids with a hydroxyl group attached at the alpha position