focal length |
the distance between the optical center of a lens or curved mirror and the far distant point where light rays converge upon an object. |
foci |
a plural form of "focus." |
fo'c's'le |
variant of forecastle. |
focus |
the point at which rays, esp. optical, come together, or from which they seem to radiate. [9 definitions] |
focusable |
combined form of focus. |
focusless |
combined form of focus. |
fodder |
feed for farm animals, such as cut-up cornstalks mixed with hay. [3 definitions] |
foe |
one who wishes ill on another; personal enemy. [5 definitions] |
foetal |
variant of fetal. |
foetid |
variant of fetid. |
foetus |
variant of fetus. |
fog |
a thick cloudlike mass or layer made up of tiny water droplets suspended in the air near the ground. [8 definitions] |
fog bank |
a distinct dense mass of fog, esp. as seen from a distance. |
fogbound |
unable to move because of fog, or surrounded by fog. |
foggy |
full of or covered by fog. [3 definitions] |
foghorn |
a loud, deep-sounding horn, as on a ship, used in fog or at night to give warning signals. |
fogless |
combined form of fog. |
fogy |
someone who has old-fashioned habits, beliefs, or ideas, esp. someone who is also boring (usu. prec. by "old"). |
foible |
a minor flaw or weakness in personality, character, or behavior. [2 definitions] |
foil1 |
to prevent (a person, plan, enterprise, effort, or the like) from succeeding. |
foil2 |
a very thin flexible sheet of metal such as aluminum. [7 definitions] |