Where semi-formal is a step down from formal, semi-casual is a step up from casual.kirt or dresses for women is allowed. Button-down dress shirts, sweaters or polo shirts are great for men and women. Men may also wear a necktie but for semi-casual it s not expected. For a casual affair such as church, dinner at a friend s home, yachting or casual dining, a nice jacket or sweater for men is best.
Home Â» Algae. Definition. noun, singular: alga. A group of photosynthetic organisms that in general possess pigments such as chlorophyll but lack true roots, stems and leaves characteristic of terrestrial plants. algal (adjective) Of, pertaining to, characteristic of, or relating to an alga. Supplement.
Define Pyrrophyta: a division or other category of algae comprising yellowish-green to golden-brown algae that are mostly unicellular andâ¦ a division or other category of algae comprising yellowish-green to golden-brown algae that are mostly unicellular and biflagellate, that formâ¦ See the full definition