a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes
a form of interferon that is produced endogenously and commercially for its pharmacological effects (including regulation of the immune system and antiviral and antineoplastic effects)
an isomer of naphthol used in dyes
a body having finite mass and internal structure but negligible dimensions
a function word that can be used in English to form phrasal verbs
the 1st letter of the Greek alphabet
early testing stage of a software or hardware product
first in order of importance
