Key terms & definitions

The Islamic term for unlawful sexual intercourse, including sex before marriage and adultery.

A sewing-machine presser foot that allows the needle to stitch close beside raised features such as zip teeth or piping cord.

An optical toy with a rotating drum containing a sequence of still pictures, which appear to move when viewed as the drum turns.

A clear area around a treatment disc on an agar plate where bacterial growth has been prevented.

A clear region around an antimicrobial disc on an agar plate where visible microbial growth has been prevented.

Dividing a protected area into sections where different activities and levels of protection are allowed.

Photosynthetic algae living within the tissues of most reef-building corals, supplying the corals with food products.

A religious tradition associated with the teachings of Zarathustra, emphasising the struggle between good and evil and human responsibility to choose rightly.

The cell formed when two gametes join at fertilisation.

The single fertilised cell formed when male and female gametes join.