- at arm's length
- ajuga reptans
- at any expense
- alfred binet
- amphibolite
- a leg_trick (in wrestling)
- a rest house for officials
- addressing character
- auroral
- as soft as butter
- a sector
- an alarm clock
- air cell
- alphageometrics
- alphanumeric storage
- alphanumeric keyboard
- ankylostoma
- automatic volume compressor
- automatic message accounting
- actinal
- automatic punch
- automatic recovery program
- automatic volume control
- automatic pagination
- adsorption chromato graphic solvent
- adsorption complex
- all_controlling
- adsorption indicator
- adsorption chromatography
- adsorbent antacid
- acadia
- anosmic
- alessandro farnese
- anorectal atresia
- anorectal manifestation
- anorectal abscess
- amenorrhoeic
- acromiothoracic
- acromiale
- arrester
- albuminuric retinitis
- ammonoid
- a shirt
- analog transmission
- a post_office
- absolute standard
- adsorption isobar
- anaesthetic gas
- alcopop
- age of consent