| ACHROMATOPSIAS | • achromatopsias n. Plural of achromatopsia. • ACHROMATOPSIA n. total colour-blindness, where only white, grey and black are visible. |
| APOCHROMATISMS | • APOCHROMATISM n. being apochromatic. |
| ARACHNOLOGISTS | • arachnologists n. Plural of arachnologist. • ARACHNOLOGIST n. one who studies arachnids. |
| ARCHAEOLOGISTS | • archaeologists n. Plural of archaeologist. • archæologists n. Plural of archæologist. • ARCHAEOLOGIST n. a practitioner of archaeology. |
| ASTRAPOPHOBIAS | • ASTRAPOPHOBIA n. a morbid fear of thunder and lightning, also ASTRAPHOBIA, ASTROPHOBIA. |
| AUTHORISATIONS | • authorisations n. Plural of authorisation. • AUTHORISATION n. the act of authorising, also AUTHORIZATION. |
| HAEMATOLOGISTS | • haematologists n. Plural of haematologist. • hæmatologists n. Plural of hæmatologist. • HAEMATOLOGIST n. a specialist in haematology, also HEMATOLOGIST. |
| HAEMATOPOIESES | • HAEMATOPOIESIS n. the formation of blood, also HAEMOPOIESIS, HEMATOPOIESIS, HEMOPOIESIS. |
| HAEMATOPOIESIS | • haematopoiesis n. (British spelling) Alternative spelling of hematopoiesis. • HAEMATOPOIESIS n. the formation of blood, also HAEMOPOIESIS, HEMATOPOIESIS, HEMOPOIESIS. |
| HARMONISATIONS | • harmonisations n. Plural of harmonisation. • HARMONISATION n. the act of harmonising, also HARMONIZATION. |
| LYMPHOSARCOMAS | • lymphosarcomas n. Plural of lymphosarcoma. • LYMPHOSARCOMA n. a tumour of the lymph glands. |
| MASTIGOPHORANS | • mastigophorans n. Plural of mastigophoran. • MASTIGOPHORAN n. any protozoan having one or more flagella, also MASTIGOPHORE. |
| PHOTOCATALYSES | • PHOTOCATALYSIS n. the promotion, acceleration or retardation of a chemical reaction by light. |
| PHOTOCATALYSIS | • photocatalysis n. (Chemistry) catalysis by a photocatalyst. • PHOTOCATALYSIS n. the promotion, acceleration or retardation of a chemical reaction by light. |
| POLYSACCHAROSE | • polysaccharose n. (Obsolete, chemistry) polysaccharide. • POLYSACCHAROSE n. any one of a class of carbohydrates whose molecules contain linked monosaccharide units, including starch, inulin, and cellulose. |
| SADOMASOCHISMS | • sadomasochisms n. (Rare) plural of sadomasochism. • SADOMASOCHISM n. the derivation of pleasure from the infliction of physical or mental pain either on others or on oneself. |
| SADOMASOCHISTS | • sadomasochists n. Plural of sadomasochist. • SADOMASOCHIST n. one who derives sexual pleasure from inflicting pain. |
| THANATOLOGISTS | • thanatologists n. Plural of thanatologist. • THANATOLOGIST n. one who studies thanatology. |